subject:(anisotropy)

University of Alberta

1. Melendez-Martinez, Jaime. Elastic Properties of Sedimentary Rocks.

Degree: PhD, Department of Physics, 2014, University of Alberta

URL: https://era.library.ualberta.ca/files/n009w2586

► Sedimentary rocks are an important research topic since such rocks are associated to sources of ground water as well as oil, gas, and mineral reservoirs.… (more)

▼ Sedimentary rocks are an important research topic since such rocks are associated to sources of ground water as well as oil, gas, and mineral reservoirs. In this work, elastic and physical properties of a variety of sedimentary samples that include glacial sediments, carbonates, shales, one evaporite, and one argillite from a variety of locations are investigated. Assuming vertical transverse isotropy, ultrasonic compressional- and shear-waves (at 1 MHz central frequency) were measured as a function of confining pressure on all samples with the exception of glacial samples which were tested assuming isotropy. Tensile strength tests (Brazilian test) were also carried out on selected glacial samples and, in addition, static-train measurements were conducted on shales and argillite samples. Lithological and textural features of samples were obtained through thin section techniques, scanning electron microscopy images and micro-tomography images. X-ray diffraction and X-Ray fluorescence provided the mineralogical oxides content information. Porosity, density, and pore structure were studied by using a mercury intrusion porosimeter and a helium pycnometer. The wide range of porosities of the studied samples (ranging from a minimum of 1% for shales to a maximum 45% for some glacial sediments) influence the measured velocities since high porosity sample shows an noticeable velocity increment as confining pressure increases as a consequence of closure of microcracks and pores, unlike low porosity samples where increment is quasi-lineal. Implementation of Gassmann´s relation to ultrasonic velocities obtained from glacial samples has negligible impact on them when assuming water saturated samples, which suggests that state of saturation it is no so important in defining such velocities and instead they are mainly frame-controlled. On the other hand, velocities measured on carbonate and evaporite samples show that samples are at best weak anisotropic, thus the intrinsic anisotropy of such rocks has a minor contribution on anisotropy observed at seismic scales. In contrast, shales and argillite samples are highly anisotropic, with the dynamic modulus obtained from velocities up to 3.31 times higher than static modulus obtained from static-strain measurements at pressures <3 MPa.

Subjects/Keywords: Anisotropy; Shales

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APA (6^th Edition):

Melendez-Martinez, J. (2014). Elastic Properties of Sedimentary Rocks. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/n009w2586

Chicago Manual of Style (16^th Edition):

Melendez-Martinez, Jaime. “Elastic Properties of Sedimentary Rocks.” 2014. Doctoral Dissertation, University of Alberta. Accessed October 19, 2019. https://era.library.ualberta.ca/files/n009w2586.

MLA Handbook (7^th Edition):

Melendez-Martinez, Jaime. “Elastic Properties of Sedimentary Rocks.” 2014. Web. 19 Oct 2019.

Vancouver:

Melendez-Martinez J. Elastic Properties of Sedimentary Rocks. [Internet] [Doctoral dissertation]. University of Alberta; 2014. [cited 2019 Oct 19]. Available from: https://era.library.ualberta.ca/files/n009w2586.

Council of Science Editors:

Melendez-Martinez J. Elastic Properties of Sedimentary Rocks. [Doctoral Dissertation]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/n009w2586

Oregon State University

2. Matusevich, David Sergio. Magneto-crystalline anisotropy calculation in thin films with defects.

Degree: PhD, Physics, 2002, Oregon State University

URL: http://hdl.handle.net/1957/31144

► The code is developed for the calculation of the magneto-crystalline anisotropy (MAE) in thin films using a classical Heisenberg hamiltonian with a correction developed by… (more)

Subjects/Keywords: Anisotropy

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APA (6^th Edition):

Matusevich, D. S. (2002). Magneto-crystalline anisotropy calculation in thin films with defects. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/31144

Chicago Manual of Style (16^th Edition):

Matusevich, David Sergio. “Magneto-crystalline anisotropy calculation in thin films with defects.” 2002. Doctoral Dissertation, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/31144.

MLA Handbook (7^th Edition):

Matusevich, David Sergio. “Magneto-crystalline anisotropy calculation in thin films with defects.” 2002. Web. 19 Oct 2019.

Vancouver:

Matusevich DS. Magneto-crystalline anisotropy calculation in thin films with defects. [Internet] [Doctoral dissertation]. Oregon State University; 2002. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/31144.

Council of Science Editors:

Matusevich DS. Magneto-crystalline anisotropy calculation in thin films with defects. [Doctoral Dissertation]. Oregon State University; 2002. Available from: http://hdl.handle.net/1957/31144

Oregon State University

3. Peery, Travis B. A theoretical description of anisotropic chemical association and its application to hydrogen-bonded fluids.

Degree: PhD, Physics, 2003, Oregon State University

URL: http://hdl.handle.net/1957/31171

► The thermodynamic and structural effects of highly anisotropic, short-ranged attraction are investigated for single- and four-site interaction models using Wertheim's multi-density graph theory of chemical… (more)

▼ The thermodynamic and structural effects of highly anisotropic, short-ranged attraction are investigated for single- and four-site interaction models using Wertheim's multi-density graph theory of chemical association. Both models consist of associating hard spheres, where the saturable attraction sites are described by conical wells centered in the hard core and evaluated in the "sticky-spot" limit. The resulting fluids then mimic many of the directional and steric-constrained properties of hydrogen-bonded fluids. The single-site model is used to explore the effects of dimerization upon the well-known properties of a planar liquid-vapor interface. Apart from hard sphere repulsion and sticky-spot attraction, a van der Waals-like dispersion interaction is incorporated to generate the critical point. Association is treated within Wertheim's thermodynamic perturbation theory, along with classical density functional methods to determine the interfacial density profile. The direct correlation functions which carry all bonding information are derived by means of the associative Ornstein-Zernike equations with a Percus-Yevick-like closure relation. The primary effects of dimerization are manifest in system thermodynamics. Critical temperatures and densities are shifted from their non-associating values and small, non-monotonic shifts in the correlation length and surface tension are also observed. While these effects are accompanied by interface compositional changes, any influence upon the density profile seems to be subsumed by use of the proper T/T[subscript c]. The four-site, network-forming model is investigated as a prototype for the thermodynamics and structural properties of water. Bonding interactions occur between "hydrogen" and electron "lone pair" sites described in the sticky-spot limit. System properties are derived under the ideal network approximation using the same methods as for the one-site model and are found to qualitatively reproduce some thermodynamic and connectivity features characteristic of real water. Partial densities are calculated self-consistently within the theory, and most thermodynamic quantities can be written in terms of the average number of hydrogen bonds per molecule. An analytical structure factor is also derived for this model. Advisors/Committee Members: Evans, Glen T. (advisor), Jansen, Henri (committee member).

Subjects/Keywords: Anisotropy

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APA (6^th Edition):

Peery, T. B. (2003). A theoretical description of anisotropic chemical association and its application to hydrogen-bonded fluids. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/31171

Chicago Manual of Style (16^th Edition):

Peery, Travis B. “A theoretical description of anisotropic chemical association and its application to hydrogen-bonded fluids.” 2003. Doctoral Dissertation, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/31171.

MLA Handbook (7^th Edition):

Peery, Travis B. “A theoretical description of anisotropic chemical association and its application to hydrogen-bonded fluids.” 2003. Web. 19 Oct 2019.

Vancouver:

Peery TB. A theoretical description of anisotropic chemical association and its application to hydrogen-bonded fluids. [Internet] [Doctoral dissertation]. Oregon State University; 2003. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/31171.

Council of Science Editors:

Peery TB. A theoretical description of anisotropic chemical association and its application to hydrogen-bonded fluids. [Doctoral Dissertation]. Oregon State University; 2003. Available from: http://hdl.handle.net/1957/31171

Oregon State University

4. Schneider, Gunter. Calculation of magnetocrystalline anisotropy.

Degree: PhD, Physics, 1999, Oregon State University

URL: http://hdl.handle.net/1957/33550

► The magnetocrystalline anisotropy energy (MAE) for fcc Ni and bcc Fe is calculated as the difference of single particle energy eigenvalue sums using a tight-binding… (more)

Subjects/Keywords: Anisotropy

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APA (6^th Edition):

Schneider, G. (1999). Calculation of magnetocrystalline anisotropy. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/33550

Chicago Manual of Style (16^th Edition):

Schneider, Gunter. “Calculation of magnetocrystalline anisotropy.” 1999. Doctoral Dissertation, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/33550.

MLA Handbook (7^th Edition):

Schneider, Gunter. “Calculation of magnetocrystalline anisotropy.” 1999. Web. 19 Oct 2019.

Vancouver:

Schneider G. Calculation of magnetocrystalline anisotropy. [Internet] [Doctoral dissertation]. Oregon State University; 1999. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/33550.

Council of Science Editors:

Schneider G. Calculation of magnetocrystalline anisotropy. [Doctoral Dissertation]. Oregon State University; 1999. Available from: http://hdl.handle.net/1957/33550

Oregon State University

5. Thongrattanasiri, Sukosin. Mode patterns in quadrupole resonator with anisotropic core.

Degree: MS, Physics, 2008, Oregon State University

URL: http://hdl.handle.net/1957/7606

► This thesis deals with applications of uniaxial anisotropic crystals for microcavity resonators with partially chaotic underlying ray dynamics. We develop an implementation of the scattering… (more)

Subjects/Keywords: microcavity; Anisotropy

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APA (6^th Edition):

Thongrattanasiri, S. (2008). Mode patterns in quadrupole resonator with anisotropic core. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/7606

Chicago Manual of Style (16^th Edition):

Thongrattanasiri, Sukosin. “Mode patterns in quadrupole resonator with anisotropic core.” 2008. Masters Thesis, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/7606.

MLA Handbook (7^th Edition):

Thongrattanasiri, Sukosin. “Mode patterns in quadrupole resonator with anisotropic core.” 2008. Web. 19 Oct 2019.

Vancouver:

Thongrattanasiri S. Mode patterns in quadrupole resonator with anisotropic core. [Internet] [Masters thesis]. Oregon State University; 2008. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/7606.

Council of Science Editors:

Thongrattanasiri S. Mode patterns in quadrupole resonator with anisotropic core. [Masters Thesis]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/7606

University of British Columbia

6. Yedlin, Mathew Jacob. Disk ray theory in transversely isotropic media .

Degree: 1978, University of British Columbia

URL: http://hdl.handle.net/2429/21324

► The first motion approximation has been used to calculate synthetic seisnograms in transversely isotropic, linear, elastic media. To achieve this end the equations of motion… (more)

Subjects/Keywords: Anisotropy

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APA (6^th Edition):

Yedlin, M. J. (1978). Disk ray theory in transversely isotropic media . (Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/21324

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yedlin, Mathew Jacob. “Disk ray theory in transversely isotropic media .” 1978. Thesis, University of British Columbia. Accessed October 19, 2019. http://hdl.handle.net/2429/21324.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yedlin, Mathew Jacob. “Disk ray theory in transversely isotropic media .” 1978. Web. 19 Oct 2019.

Vancouver:

Yedlin MJ. Disk ray theory in transversely isotropic media . [Internet] [Thesis]. University of British Columbia; 1978. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/2429/21324.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yedlin MJ. Disk ray theory in transversely isotropic media . [Thesis]. University of British Columbia; 1978. Available from: http://hdl.handle.net/2429/21324

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Houston

7. Lin, Rongrong 1989-. Extracting Polar Anisotropy Parameters from Seismic Data.

Degree: Earth and Atmospheric Sciences, Department of, 2013, University of Houston

URL: http://hdl.handle.net/10657/3288

► With Vp, Vs, and density well logs, we can do isotropic AVO forward modeling, using isotropic Zoeppritz equations or its approximations, and a wavelet extracted… (more)

Subjects/Keywords: Anisotropy; AVO

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APA (6^th Edition):

Lin, R. 1. (2013). Extracting Polar Anisotropy Parameters from Seismic Data. (Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/3288

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lin, Rongrong 1989-. “Extracting Polar Anisotropy Parameters from Seismic Data.” 2013. Thesis, University of Houston. Accessed October 19, 2019. http://hdl.handle.net/10657/3288.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lin, Rongrong 1989-. “Extracting Polar Anisotropy Parameters from Seismic Data.” 2013. Web. 19 Oct 2019.

Vancouver:

Lin R1. Extracting Polar Anisotropy Parameters from Seismic Data. [Internet] [Thesis]. University of Houston; 2013. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10657/3288.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lin R1. Extracting Polar Anisotropy Parameters from Seismic Data. [Thesis]. University of Houston; 2013. Available from: http://hdl.handle.net/10657/3288

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Houston

8. -3339-6083. Seismic Anisotropy Dependence on Fluids, Fractures, and Stress: Physical Modeling with Bakken and Barnett Shale Field Cases.

Degree: Earth and Atmospheric Sciences, Department of, 2015, University of Houston

URL: http://hdl.handle.net/10657/1925

► A major goal of geophysical research is to understand and predict the seismic response of fluids, fractures, and stress in the subsurface. In this dissertation,… (more)

▼ A major goal of geophysical research is to understand and predict the seismic response of fluids, fractures, and stress in the subsurface. In this dissertation, we explored different forward modeling and field techniques with the goal of quantifying seismic anisotropy and its relationship with subsurface states. This dissertation includes two series of physical modeling experiments as well as analyses of wide-azimuth 3D data from the Williston Basin in North Dakota and the Fort Worth Basin in Texas. In the first set of lab experiments, we explored fluid substitution effects in a synthetic anisotropic medium. We observed the effects of different fluids on wide-azimuth P-wave NMO ellipses from our synthetic composite rock sample. We find that fluid substitution from air to water can increase inherent anisotropies by as much as 50%. We also observe changes in P-wave NMO ellipses as a function of different fluid saturants in the synthetic sample. In the second set of experiments, we varied uniaxial normal stress and measured transit-time and its associated effects on a layered synthetic orthorhombic medium. The experiment was designed to measure the dynamic elastic properties of sedimentary reservoir rocks deposited in layers under stress. Results show a general increase in all measured velocities with stress ranging from 4% to 10%. We also observed anisotropic behavior a priori to both orthorhombic and VTI symmetries in different principal axes of the synthetic sample as uniaxial stress changes. 3D wide-azimuth data from the Ross Field of the Williston Basin in North Dakota is fully processed using conventional techniques. We presented a velocity-based workflow for inverting for the direction and intensity of preferred orientations within the subsurface. We demonstrate a potential for using wide-azimuth P-wave seismic data as a tool for subsurface characterization in shale reservoirs. Lastly, using fully processed wide-azimuth 3D dataset and wells from the Fort Worth Basin in Texas, we presented a workflow that integrated RMO analysis and azimuthally sectored inversions to generate a broad overview of subsurface orientation in the Barnett shale play. Advisors/Committee Members: Stewart, Robert R. (advisor), Chesnokov, Evgeny (committee member), Zheng, Yingcai (committee member), Peterson, Steven (committee member).

Subjects/Keywords: Seismology; Anisotropy

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APA (6^th Edition):

-3339-6083. (2015). Seismic Anisotropy Dependence on Fluids, Fractures, and Stress: Physical Modeling with Bakken and Barnett Shale Field Cases. (Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/1925

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

-3339-6083. “Seismic Anisotropy Dependence on Fluids, Fractures, and Stress: Physical Modeling with Bakken and Barnett Shale Field Cases.” 2015. Thesis, University of Houston. Accessed October 19, 2019. http://hdl.handle.net/10657/1925.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

-3339-6083. “Seismic Anisotropy Dependence on Fluids, Fractures, and Stress: Physical Modeling with Bakken and Barnett Shale Field Cases.” 2015. Web. 19 Oct 2019.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-3339-6083. Seismic Anisotropy Dependence on Fluids, Fractures, and Stress: Physical Modeling with Bakken and Barnett Shale Field Cases. [Internet] [Thesis]. University of Houston; 2015. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10657/1925.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

-3339-6083. Seismic Anisotropy Dependence on Fluids, Fractures, and Stress: Physical Modeling with Bakken and Barnett Shale Field Cases. [Thesis]. University of Houston; 2015. Available from: http://hdl.handle.net/10657/1925

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

9. MacDougall, Julia. Lithospheric and Asthenospheric Seismic Anisotropy at Collisional and Passive Margins.

Degree: PhD, Geological Sciences, 2014, Brown University

URL: https://repository.library.brown.edu/studio/item/bdr:386220/

► Seismic anisotropy in olivine and orthopyroxene mineral crystals enables us to infer first-order flow characteristics in the asthenospheric mantle and the preserved tectonic history in… (more)

▼ Seismic anisotropy in olivine and orthopyroxene mineral crystals enables us to infer first-order flow characteristics in the asthenospheric mantle and the preserved tectonic history in the lithospheric mantle of continental plates. This work focuses on the observed seismic anisotropy within both the lithospheric and asthenospheric mantle in the southern South American subduction zone, the southeastern United States, and the Hindu Kush-Pamir region. Because these three study areas represent different tectonic environments, their patterns and sources of seismic anisotropy are diverse. Chapter 1 is devoted to the observation, modeling, and interpretation of local S and teleseismic SK(K)S shear-wave splitting results in the southern South American subduction zone. We theorize that the observed shear-wave splitting in the asthenospheric mantle indicates a combination of flow through a slab gap, the presence of the flat Pampean slab segment, and rollback of the subducting Nazca slab. In Chapter 2, we examine the effects of those flow drivers on asthenospheric mantle flow using a subduction zone laboratory tank model. With this apparatus, we can replicate some of the flow patterns discussed in Chapter 1, including the strong pull of mantle wedge material towards the shallowly-dipping slab, analogous to the Pampean flat slab segment. In Chapter 3, we use Pn phases from regional earthquakes in the southeastern United States to constrain lateral variation and azimuthal anisotropy in uppermost mantle P-wave velocities. In particular, mantle P-wave velocities are significantly lower beneath the Blue Ridge Mountains, suggesting that mantle structure may contribute to supporting the higher elevations. We also measure azimuthal anisotropy in this region in Chapter 4, but here, we use S-waves to measure SK(K)S shear-wave splitting. Because of the close station spacing and the density of shear-wave splitting data, we are able to define distinct lithospheric mantle anisotropy signatures that vary between accreted terranes. Lastly, in Chapter 5, we conduct a shear-wave splitting study in the Hindu Kush-Pamir region, where the SK(K)S splitting is primarily sampling asthenospheric mantle flow induced by absolute plate motion of the Eurasian Plate. The shallow upper plate mantle, as sampled by local S waves, is not strongly anisotropic. Advisors/Committee Members: Fischer, Karen (Director), Forsyth, Donald (Reader), Parman, Stephen (Reader), Parmentier, Edgar (Reader), Kincaid, Chris (Reader).

Subjects/Keywords: Seismic anisotropy

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APA (6^th Edition):

MacDougall, J. (2014). Lithospheric and Asthenospheric Seismic Anisotropy at Collisional and Passive Margins. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:386220/

Chicago Manual of Style (16^th Edition):

MacDougall, Julia. “Lithospheric and Asthenospheric Seismic Anisotropy at Collisional and Passive Margins.” 2014. Doctoral Dissertation, Brown University. Accessed October 19, 2019. https://repository.library.brown.edu/studio/item/bdr:386220/.

MLA Handbook (7^th Edition):

MacDougall, Julia. “Lithospheric and Asthenospheric Seismic Anisotropy at Collisional and Passive Margins.” 2014. Web. 19 Oct 2019.

Vancouver:

MacDougall J. Lithospheric and Asthenospheric Seismic Anisotropy at Collisional and Passive Margins. [Internet] [Doctoral dissertation]. Brown University; 2014. [cited 2019 Oct 19]. Available from: https://repository.library.brown.edu/studio/item/bdr:386220/.

Council of Science Editors:

MacDougall J. Lithospheric and Asthenospheric Seismic Anisotropy at Collisional and Passive Margins. [Doctoral Dissertation]. Brown University; 2014. Available from: https://repository.library.brown.edu/studio/item/bdr:386220/

University of Waterloo

10. Wang, Jingqi. Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy.

Degree: 2019, University of Waterloo

URL: http://hdl.handle.net/10012/15148

► Foldamers represent a family of synthetic macromolecules which, like their biological counterparts, are able to adopt a well-defined conformation in solution. Oligoquinoline-carboxamides (Qn) are a… (more)

▼ Foldamers represent a family of synthetic macromolecules which, like their biological counterparts, are able to adopt a well-defined conformation in solution. Oligoquinoline-carboxamides (Qn) are a group of foldamers that adopt a helical conformation in solution. A series of Qn foldamers were prepared by chromatography-free large-scale synthesis and segment-doubling strategy. The C-terminal ester group of the Qn foldamers could be hydrolyzed to yield acid-functionalized foldamers (QnA) which could self-assemble into larger ((QnA)2-Na) complexes by metal coordination with a sodium cation. Moreover, the addition of a bis-acid functionalized tetramer (AQ2PQ2A) to a solution of (QnA)2-Na complexes resulted in insertion oligomeric products. To characterize these complexes in solution, both Qn and QnA were end-labeled with an oligo(phenylene vinylene) dye (OPV) at their N-terminus via a rigid amide bond to yield the OPV-Qn and OPV-QnA fluorescent equivalents. OPV was used to conduct time-resolved fluorescence anisotropy (TRFA) measurements on the OPV-Qn and OPV-QnA foldamers, the (OPV-QnA)2-Na complexes, and the OPV-Qn-Na-(AQ2PQ2A)n oligomers. Analysis of the TRFA of the OPV-Qn foldamers yielded the rotational time () of the fluorescent species, which was found to reflect the hydrodynamic volume (Vh) of the foldamers. The straight line obtained by plotting as a function of the number of (quinoline) units (NUs) demonstrated that the foldamers behaved in solution as rigid cylinders for all lengths examined. The linearity of the -vs-NU plot was employed as a calibration curve against which the rotational time of the QnA-complexes could be compared. Within experimental error, the rotational time of a Qn+m complex was found to equal the sum of the rotational times obtained for Qn and Qm. This result suggests that the complexation of two acid-functionalized oligoquinoline foldamers in solution generated a fully stacked foldamer with a NU equal to the sum of the NUs of its constituting elements. Hetero-complexes between OPV-Q8A and Q16A were also produced by adding a 10-fold excess of Q16A to an OPV-Q8A solution. Complexation was demonstrated by the  value of the mixture, that equaled that of an OPV-Q24 foldamer. Dilution experiments on a solution of OPV-Q8A-Na-Q16A complexes led to the dissociation of the complexes into their OPV-Q8A and Q16A constituting elements, as evidenced by the progressive decrease in  from the value obtained for OPV-Q24 to that of OPV-Q8 upon decreasing foldamer concentration. Similarly, the addition of increasing amounts of AQ2PQ2A to a solution of OPV-Q8A in chloroform resulted in an increase in  demonstrating the formation of complexes between OPV-Q8A and AQ2PQ2A until reached a plateau for large OPV-Q8A/AQ2PQ2A molar ratios. In the plateau region, the rotational time of the oligomeric complexes generated from OPV-Q8A and AQ2PQ2A stabilized by isobutyl or hexyl side chains was equal to that of an OPV-Q¬n foldamer with n equal to 24 or 30, respectively. The apparent absence of further…

Subjects/Keywords: Fluorescence Anisotropy

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APA (6^th Edition):

Wang, J. (2019). Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Jingqi. “Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy.” 2019. Thesis, University of Waterloo. Accessed October 19, 2019. http://hdl.handle.net/10012/15148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Jingqi. “Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy.” 2019. Web. 19 Oct 2019.

Vancouver:

Wang J. Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10012/15148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang J. Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/15148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

11. Wang, Hsian-jen. Magnetic domain evolution in nanoscale disk.

Degree: Master, Physics, 2009, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713109-185824

► Magnetism is one of material essential attributes, the different materialâs magnetic has been studied for many years as well as the application.The processing is smaller… (more)

Subjects/Keywords: Anisotropy; Domain; Cobalt

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APA (6^th Edition):

Wang, H. (2009). Magnetic domain evolution in nanoscale disk. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713109-185824

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Hsian-jen. “Magnetic domain evolution in nanoscale disk.” 2009. Thesis, NSYSU. Accessed October 19, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713109-185824.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Hsian-jen. “Magnetic domain evolution in nanoscale disk.” 2009. Web. 19 Oct 2019.

Vancouver:

Wang H. Magnetic domain evolution in nanoscale disk. [Internet] [Thesis]. NSYSU; 2009. [cited 2019 Oct 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713109-185824.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang H. Magnetic domain evolution in nanoscale disk. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713109-185824

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Wayne State University

12. Watling, Brittany. Seismic Anisotropy As A Function Of Mineralogy And Rock Type In Chester Gneiss Dome, Southeast Vermont.

Degree: MS, Geology, 2017, Wayne State University

URL: https://digitalcommons.wayne.edu/oa_theses/593

► Our knowledge of composition and structure in middle and lower crustal rocks is limited due to restricted accessibility, and thus comes mainly from studies… (more)

Subjects/Keywords: seismic anisotropy; Geology

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APA (6^th Edition):

Watling, B. (2017). Seismic Anisotropy As A Function Of Mineralogy And Rock Type In Chester Gneiss Dome, Southeast Vermont. (Masters Thesis). Wayne State University. Retrieved from https://digitalcommons.wayne.edu/oa_theses/593

Chicago Manual of Style (16^th Edition):

Watling, Brittany. “Seismic Anisotropy As A Function Of Mineralogy And Rock Type In Chester Gneiss Dome, Southeast Vermont.” 2017. Masters Thesis, Wayne State University. Accessed October 19, 2019. https://digitalcommons.wayne.edu/oa_theses/593.

MLA Handbook (7^th Edition):

Watling, Brittany. “Seismic Anisotropy As A Function Of Mineralogy And Rock Type In Chester Gneiss Dome, Southeast Vermont.” 2017. Web. 19 Oct 2019.

Vancouver:

Watling B. Seismic Anisotropy As A Function Of Mineralogy And Rock Type In Chester Gneiss Dome, Southeast Vermont. [Internet] [Masters thesis]. Wayne State University; 2017. [cited 2019 Oct 19]. Available from: https://digitalcommons.wayne.edu/oa_theses/593.

Council of Science Editors:

Watling B. Seismic Anisotropy As A Function Of Mineralogy And Rock Type In Chester Gneiss Dome, Southeast Vermont. [Masters Thesis]. Wayne State University; 2017. Available from: https://digitalcommons.wayne.edu/oa_theses/593

Colorado School of Mines

13. Kamath, Nishant. Full-waveform inversion in 2D VTI media.

Degree: PhD, Geophysics, 2016, Colorado School of Mines

URL: http://hdl.handle.net/11124/170111

► Full-waveform inversion (FWI) is a technique designed to produce a high-resolution model of the subsurface by using information contained in entire seismic waveforms. This thesis… (more)

▼ Full-waveform inversion (FWI) is a technique designed to produce a high-resolution model of the subsurface by using information contained in entire seismic waveforms. This thesis presents a methodology for FWI in elastic VTI (transversely isotropic with a vertical axis of symmetry) media and discusses synthetic results for heterogeneous VTI models. First, I develop FWI for multicomponent data from a horizontally layered VTI model. The reflectivity method, which permits computation of only PP reflections or a combination of PP and PSV events, is employed to model the data. The Gauss-Newton technique is used to invert for the interval Thomsen parameters, while keeping the densities fixed at the correct values. Eigenval- ue/eigenvector decompostion of the Hessian matrix helps analyze the sensitivity of the objective function to the model parameters. Whereas PP data alone are generally sufficient to constrain all four Thomsen parameters even for conventional spreads, including PS reflections provides better constraints, especially for the deeper part of the model. Next, I derive the gradients of the FWI objective function with respect to the stiffness coef- ficients of arbitrarily anisotropic media by employing the adjoint-state method. From these ex- pressions, it is straightforward to compute the gradients for parameters of 2D heterogeneous VTI media. FWI is implemented in the time domain with the steepest-descent method used to itera- tively update the model. The algorithm is tested on transmitted multicomponent data generated for Gaussian anomalies in Thomsen parameters embedded in homogeneous VTI media. To test the sensitivity of the objective function to different model parameters, I derive an an- alytic expression for the Fr ́echet kernel of FWI for arbitrary anisotropic symmetry by using the Born approximation and asymptotic Green’s functions. The amplitude of the kernel, which repre- sents the radiation pattern of a secondary source (that source describes a perturbation in a model parameter), yields the angle-dependent energy scattered by the perturbation. Then the radiation patterns are obtained for anomalies in VTI parameters embedded in isotropic homogeneous media and employed to analyze the inversion results for the transmission FWI experiments. To understand some of the challenges posed by data recorded in surface surveys, I generate the multicomponent wavefield for a model based on a geologic section of the Valhall Field in the North Sea. A multiscale approach is adopted to perform FWI in the time domain. For the available offset range, diving-wave energy illuminates the top 1.5 km of the section, with the updates in the deeper regions due primarily to the reflections. FWI is tested for three model parameterizations and the results are explained in terms of the P- and SV-radiation patterns described above. These parameterizations lead to different trade-offs, and the choice of parameterization for a given data set depends on the recorded offset range, the quality of the… Advisors/Committee Members: TSvankin, I. D. (advisor), Hale, Dave, 1955- (committee member), Krahenbuhl, Richard A. (committee member), Tutuncu, Azra (committee member), Tenorio, Luis (committee member).

Subjects/Keywords: Anisotropy; Elastic; Inversion

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APA (6^th Edition):

Kamath, N. (2016). Full-waveform inversion in 2D VTI media. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/170111

Chicago Manual of Style (16^th Edition):

Kamath, Nishant. “Full-waveform inversion in 2D VTI media.” 2016. Doctoral Dissertation, Colorado School of Mines. Accessed October 19, 2019. http://hdl.handle.net/11124/170111.

MLA Handbook (7^th Edition):

Kamath, Nishant. “Full-waveform inversion in 2D VTI media.” 2016. Web. 19 Oct 2019.

Vancouver:

Kamath N. Full-waveform inversion in 2D VTI media. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2016. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/11124/170111.

Council of Science Editors:

Kamath N. Full-waveform inversion in 2D VTI media. [Doctoral Dissertation]. Colorado School of Mines; 2016. Available from: http://hdl.handle.net/11124/170111

California State University – Northridge

14. Nunley, Melissa. Seismic anisotropy beneath African plate.

Degree: MS, Department of Geological Sciences, 2013, California State University – Northridge

URL: http://hdl.handle.net/10211.2/3289

► The African continental plate is composed of a series of cratons and mobile belts with activation ages ranging from the present to the Archean. Although… (more)

▼ The African continental plate is composed of a series of cratons and mobile belts with activation ages ranging from the present to the Archean. Although previous studies show the assembly of Africa has left behind a complex crust and lithospheric fabric, the style and timing of deformation is not well known. To study the degree and style of deformation of continental lithosphere during rifting and collisional events, I use seismic anisotropy to measure mineral alignment and strain accommodated by these tectonic events. Here I study seismic anisotropy beneath the African continent using instruments within the Africa Array and permanent Global Seismic Network stations located throughout Africa. I use SKS phases and shear wave splitting techniques for 28 teleseismic earthquake events. Stations located in the Ethiopian rift zone yield a NE-SW fast direction with the largest delay times of 1.5 s. One station (KOWA) located in the West African craton and three other stations located on the West African coast display a NW-SE fast direction and average delay times of 0.8 s. A group of stations located on Archean crust in central Africa skirt the Congo craton and display consistent NNE fast directions and delay times of 1.0 s. Two stations, LSZ and TEZI are located in the Damara suture belt between the Congo and Kaapvaal cratons display a NE-SW fast direction parallel to the suture axis. New stations available south of the Kaapvaal craton reveal a NE fast direction with delay times that vary from 0.5 to 1.3 s. These results indicate that seismic anisotropy across the African continent is not uniform as might be suggested from absolute plate motion. Our results, however, do show consistent variations between cratonic regions and mobile belts. The delay times averaged over the cratonic regions is 0.67 s +/- 0.14 s and are significantly smaller than delay times observed in mobile belts of 1.4 s +/- 0.07 s. Comparison of the fast direction of anisotropy within cratons with current plate motion suggests that the majority of the splitting observations within cratons are due to remnant fossil fabric from previous collisional events and has very little contribution from sublithospheric mantle flow today. We suggest that repeated convergent and rifting events causes depletion and dehydration within a craton creating stronger, and stable lithosphere that is resistant to deformation during later collisional events. By contrast, mobile belts that are younger in age and more fertile are more readily deformed under large tectonic stresses. Remnant or ancient anisotropic fabric may thus be preserved in cratonic lithosphere where it is stored from previous collisions while mobile belts reflect the most recent tectonic events. Advisors/Committee Members: Weeraratne, Dayanthie S. (advisor), Simila, Gerald W. (committee member).

Subjects/Keywords: Anisotropy; Dissertations, Academic ??? CSUN

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APA (6^th Edition):

Nunley, M. (2013). Seismic anisotropy beneath African plate. (Masters Thesis). California State University – Northridge. Retrieved from http://hdl.handle.net/10211.2/3289

Chicago Manual of Style (16^th Edition):

Nunley, Melissa. “Seismic anisotropy beneath African plate.” 2013. Masters Thesis, California State University – Northridge. Accessed October 19, 2019. http://hdl.handle.net/10211.2/3289.

MLA Handbook (7^th Edition):

Nunley, Melissa. “Seismic anisotropy beneath African plate.” 2013. Web. 19 Oct 2019.

Vancouver:

Nunley M. Seismic anisotropy beneath African plate. [Internet] [Masters thesis]. California State University – Northridge; 2013. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10211.2/3289.

Council of Science Editors:

Nunley M. Seismic anisotropy beneath African plate. [Masters Thesis]. California State University – Northridge; 2013. Available from: http://hdl.handle.net/10211.2/3289

University of Alberta

15. Umezawa, Ado. Magnetic anisotropy in the high transition temperature superconductor YBa2Cu3O7-[delta].

Degree: PhD, Department of Physics, 1991, University of Alberta

URL: https://era.library.ualberta.ca/files/mk61rk15g

Subjects/Keywords: Anisotropy.; Superconductors.

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APA (6^th Edition):

Umezawa, A. (1991). Magnetic anisotropy in the high transition temperature superconductor YBa2Cu3O7-[delta]. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/mk61rk15g

Chicago Manual of Style (16^th Edition):

Umezawa, Ado. “Magnetic anisotropy in the high transition temperature superconductor YBa2Cu3O7-[delta].” 1991. Doctoral Dissertation, University of Alberta. Accessed October 19, 2019. https://era.library.ualberta.ca/files/mk61rk15g.

MLA Handbook (7^th Edition):

Umezawa, Ado. “Magnetic anisotropy in the high transition temperature superconductor YBa2Cu3O7-[delta].” 1991. Web. 19 Oct 2019.

Vancouver:

Umezawa A. Magnetic anisotropy in the high transition temperature superconductor YBa2Cu3O7-[delta]. [Internet] [Doctoral dissertation]. University of Alberta; 1991. [cited 2019 Oct 19]. Available from: https://era.library.ualberta.ca/files/mk61rk15g.

Council of Science Editors:

Umezawa A. Magnetic anisotropy in the high transition temperature superconductor YBa2Cu3O7-[delta]. [Doctoral Dissertation]. University of Alberta; 1991. Available from: https://era.library.ualberta.ca/files/mk61rk15g

Texas A&M University

16. Gao, Kai. Multiscale Method for Elastic Wave Propagation in the Heterogeneous, Anisotropic Media.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153630

► Seismic wave simulation in realistic Earth media with full wavefield methods is a fundamental task in geophysical studies. Conventional approaches such as the finite-difference method… (more)

▼ Seismic wave simulation in realistic Earth media with full wavefield methods is a fundamental task in geophysical studies. Conventional approaches such as the finite-difference method and the finite-element method solve the wave equation in geological models represented with discrete grids and elements. When the Earth model includes complex heterogeneities at multiple spatial scales, the simulation requires fine discretization and therefore a system with many degrees of freedom, which often exceeds current computational abilities. In this dissertation, I address this problem by proposing new multiscale methods for simulating elastic wave propagation based on previously developed algorithms for solving the elliptic partial differential equations and the acoustic wave equation. The fundamental motivation for developing the multiscale method is that it can solve the wave equation on a coarsely discretized mesh by incorporating the effects of fine-scale medium properties using so-called multiscale basis functions. This can greatly reduce computation time and degrees of freedom compared with conventional methods. I first derive a numerical homogenization method for arbitrarily heterogeneous, anisotropic media that utilizes the multiscale basis functions determined from a local linear elasticity equation to compute effective, anisotropic properties, and these equivalent elastic medium parameters can be used directly in existing elastic modeling algorithms. Then I extend the approach by constructing multiple basis functions using two types of appropriately defined local spectral linear elasticity problems. Given the eigenfunctions determined from local spectral problems, I develop a generalized multiscale finite-element method (GMsFEM) for elastic wave propagation in heterogeneous, anisotropic media in both continuous Galerkin (CG) and discontinuous Galerkin (DG) formulations. The advantage of the multiscale basis functions is they are model-dependent, unlike the predefined polynomial basis functions applied in conventional finite-element methods. For this reason, the GMsFEM can effectively capture the influence of fine-scale variation of the media. I present results for several numerical experiments to verify the effectiveness of both the numerical homogenization method and GMsFEM. These tests show that the effectiveness of the multiscale method relies on the appropriate choice of boundary conditions that are applied for the local problem in numerical homogenization method and on the selection of basis functions from a large set of eigenfunctions contained in local spectral problems in GMsFEM. I develop methods for solving both these problems, and the results confirm that the multiscale method can be powerful tool for providing accurate full wavefield solutions in heterogeneous, anisotropic media, yet with reduced computation time and degrees of freedom compared with conventional full wavefield modeling methods. Specially, I applied the DG-GMsFEM to the Marmousi-2 elastic model, and find that DG-GMsFEM can greatly reduce… Advisors/Committee Members: Gibson Jr., Richard L (advisor), Efendiev, Yalchin (advisor), Chester, Frederick M (committee member), Everett, Mark E (committee member), Duan, Benchun (committee member).

Subjects/Keywords: elastic wave; anisotropy; multiscale

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APA (6^th Edition):

Gao, K. (2014). Multiscale Method for Elastic Wave Propagation in the Heterogeneous, Anisotropic Media. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153630

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gao, Kai. “Multiscale Method for Elastic Wave Propagation in the Heterogeneous, Anisotropic Media.” 2014. Thesis, Texas A&M University. Accessed October 19, 2019. http://hdl.handle.net/1969.1/153630.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gao, Kai. “Multiscale Method for Elastic Wave Propagation in the Heterogeneous, Anisotropic Media.” 2014. Web. 19 Oct 2019.

Vancouver:

Gao K. Multiscale Method for Elastic Wave Propagation in the Heterogeneous, Anisotropic Media. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1969.1/153630.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gao K. Multiscale Method for Elastic Wave Propagation in the Heterogeneous, Anisotropic Media. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153630

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Victoria University of Wellington

17. Wessel, Andreas. Automatic Shear Wave Splitting Measurements at Mt. Ruapehu Volcano, New Zealand.

Degree: 2010, Victoria University of Wellington

URL: http://hdl.handle.net/10063/1429

► This thesis presents an automatic shear wave splitting measurement tool and the results from its application to data recorded in the vicinity of Mt. Ruapehu… (more)

Subjects/Keywords: Anisotropy; Ruapehu; Shear wave splitting

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APA (6^th Edition):

Wessel, A. (2010). Automatic Shear Wave Splitting Measurements at Mt. Ruapehu Volcano, New Zealand. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/1429

Chicago Manual of Style (16^th Edition):

Wessel, Andreas. “Automatic Shear Wave Splitting Measurements at Mt. Ruapehu Volcano, New Zealand.” 2010. Masters Thesis, Victoria University of Wellington. Accessed October 19, 2019. http://hdl.handle.net/10063/1429.

MLA Handbook (7^th Edition):

Wessel, Andreas. “Automatic Shear Wave Splitting Measurements at Mt. Ruapehu Volcano, New Zealand.” 2010. Web. 19 Oct 2019.

Vancouver:

Wessel A. Automatic Shear Wave Splitting Measurements at Mt. Ruapehu Volcano, New Zealand. [Internet] [Masters thesis]. Victoria University of Wellington; 2010. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10063/1429.

Council of Science Editors:

Wessel A. Automatic Shear Wave Splitting Measurements at Mt. Ruapehu Volcano, New Zealand. [Masters Thesis]. Victoria University of Wellington; 2010. Available from: http://hdl.handle.net/10063/1429

Victoria University of Wellington

18. Syuhada. Seismic Attenuation Anisotropy in the Southernmost Part of the Taupo Volcanic Zone, North Island, New Zealand.

Degree: 2010, Victoria University of Wellington

URL: http://hdl.handle.net/10063/1536

► We investigate the mechanisms of seismic anisotropy and attenuation (1/Q) beneath the southernmost part of the Taupo Volcanic Zone (TVZ) by computing variations in S-wave… (more)

▼ We investigate the mechanisms of seismic anisotropy and attenuation (1/Q) beneath the southernmost part of the Taupo Volcanic Zone (TVZ) by computing variations in S-wave attenuation factors with the direction of wave polarization. We rotate pairs of horizontal components in steps of 22.5◦ from 0◦ to 67.5◦ and into the radial and transverse directions to search for the optimal separation of the attenuation curves and thereby determine an anisotropy symmetry system. The frequency dependence of Q for the rotated S-waves is estimated by means of the non-parametric generalized inversion technique (GIT) of Castro et al. (1990) using shallow earthquakes (< 40 km depth) recorded by GeoNet within 100 km of Mt. Ruapehu. To analyze the effects on computed attenuation properties of source locations, we divide our dataset into two groups: a “TVZ” group containing earthquakes within the TVZ in a distance range of 5–55 km and a “non-TVZ” group containing earthquakes outside the TVZ in a distance range of 5–50 km. To measure Q, we compute the spectral amplitude decay with distance in terms of empirical functions at 20 separate frequencies in the frequency bands 2–10 Hz and 2– 12 Hz for the TVZ and non-TVZ datasets respectively. We construct homogeneous and two-layer Q models for the TVZ dataset based on characteristic features of the attenuation function, while for outside TVZ we only analyse a homogeneous Q model. The homogeneous Q models obtained for the two datasets indicate that S-waves are more attenuated within the TVZ than outside. The homogeneous Q model for the TVZ dataset reveals that the S-wave is anisotropic at high frequencies ( f > 6 Hz) along N–S/E– W directions with the relation QSE ( f ) = (6.15±1.22) f (1.73±0.12) and QSN ( f ) = (4.14± 1.26) f (2.06±0.14), while the non-TVZ dataset shows a weak frequency dependence of attenuation anisotropy at low frequencies in NE–SW/SE–NW directions giving the power law function QSNE ( f ) = (50.93±1.18) f (0.20±0.10) and QSSE ( f ) = (22.60±1.10) f (0.53±0.06). Here, the uncertainty estimates are 95% confidence intervals. To investigate the variation of attenuation anisotropy with depth within the TVZ, we first calculate Q along propagation paths (< 25 km, which corresponds to a maximum turning point depth of 9 km ) and then using paths of 25–55 km length. Small attenuation anisotropy with low attenuation in the N–S direction for the upper crust of TVZ may be related to heterogenous structure as reported by previous studies. Attenuation anisotropy in the northwest direction yielding lower attenuation inferred for the deeper crust suggests the presence of connected melt aligned with the extension direction of TVZ . Advisors/Committee Members: Savage, Martha.

Subjects/Keywords: Attenuation; Anisotropy; Taupo Volcanic Zone

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APA (6^th Edition):

Syuhada. (2010). Seismic Attenuation Anisotropy in the Southernmost Part of the Taupo Volcanic Zone, North Island, New Zealand. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/1536

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

Syuhada. “Seismic Attenuation Anisotropy in the Southernmost Part of the Taupo Volcanic Zone, North Island, New Zealand.” 2010. Masters Thesis, Victoria University of Wellington. Accessed October 19, 2019. http://hdl.handle.net/10063/1536.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

Syuhada. “Seismic Attenuation Anisotropy in the Southernmost Part of the Taupo Volcanic Zone, North Island, New Zealand.” 2010. Web. 19 Oct 2019.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Syuhada. Seismic Attenuation Anisotropy in the Southernmost Part of the Taupo Volcanic Zone, North Island, New Zealand. [Internet] [Masters thesis]. Victoria University of Wellington; 2010. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10063/1536.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

Syuhada. Seismic Attenuation Anisotropy in the Southernmost Part of the Taupo Volcanic Zone, North Island, New Zealand. [Masters Thesis]. Victoria University of Wellington; 2010. Available from: http://hdl.handle.net/10063/1536

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Victoria University of Wellington

19. Walsh, Ernestynne. Measuring Shear Wave Splitting Using the Silver and Chan Method.

Degree: 2012, Victoria University of Wellington

URL: http://hdl.handle.net/10063/2608

► Seismic shear waves emitted by earthquakes can be modelled as plane (transverse) waves. When entering an anisotropic medium they can be split into two orthogonal… (more)

Subjects/Keywords: Seismic waves; Seismometry; Anisotropy

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APA (6^th Edition):

Walsh, E. (2012). Measuring Shear Wave Splitting Using the Silver and Chan Method. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/2608

Chicago Manual of Style (16^th Edition):

Walsh, Ernestynne. “Measuring Shear Wave Splitting Using the Silver and Chan Method.” 2012. Masters Thesis, Victoria University of Wellington. Accessed October 19, 2019. http://hdl.handle.net/10063/2608.

MLA Handbook (7^th Edition):

Walsh, Ernestynne. “Measuring Shear Wave Splitting Using the Silver and Chan Method.” 2012. Web. 19 Oct 2019.

Vancouver:

Walsh E. Measuring Shear Wave Splitting Using the Silver and Chan Method. [Internet] [Masters thesis]. Victoria University of Wellington; 2012. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10063/2608.

Council of Science Editors:

Walsh E. Measuring Shear Wave Splitting Using the Silver and Chan Method. [Masters Thesis]. Victoria University of Wellington; 2012. Available from: http://hdl.handle.net/10063/2608

University of Edinburgh

20. Ekanem, Aniekan Martin. Analysis of P-wave attenuation anisotropy in fractured porous media.

Degree: 2012, University of Edinburgh

URL: http://hdl.handle.net/1842/7621

► Fractures exert a strong influence on fluid flow in subsurface reservoirs, and hence an adequate understanding of fracture properties could provide useful information on how… (more)

▼ Fractures exert a strong influence on fluid flow in subsurface reservoirs, and hence an adequate understanding of fracture properties could provide useful information on how they may be managed optimally to produce oil and gas or to be used as repositories for carbon dioxide (CO2) to mitigate climate change. Since fractures are commonly aligned by the stress field, seismic anisotropy is a key tool in investigating their properties. Velocity anisotropy is now a well-established technique for determining properties such as fracture orientation and density, but in recent years, attention has focused on quantifying azimuthal variations in Pwave attenuation to provide additional information, especially on the fracture size. However, the practical application of this attribute in geophysical exploration is still limited due to the uncertainty associated with its measurement and the difficulty in its interpretation in terms of rock properties. There is still a lack of proper understanding of the physical processes involved in the mechanisms of attenuation anisotropy. In this thesis, I use the seismic modelling approach to study the effects of attenuation anisotropy in fractured porous media using P-waves with the main aim of improving the understanding of these effects and exploring the physical basis of using attenuation anisotropy as a potential tool for the characterization of fractured reservoirs. Fractures with length on the order of the seismic wavelength in reservoir rocks cause scattering of seismic waves which exhibits characteristic azimuthal variations. I study these scattering effects using complementary seismic physical (scale-model laboratory experiments) and numerical (finite difference) modelling approaches. The results of both approaches are consistent in delineating fracture properties from seismic data. The scattered energy is quantified through estimates of the attenuation factor (the inverse of the seismic quality factor Q) and shown to be anisotropic, with elliptical (cos2θ) variations with respect to the survey azimuth angle θ. The minor axis of the Q ellipse corresponds to the fracture normal. In this direction, i.e. across the material grain, the attenuation is a maximum. The major axis corresponds to the fracture strike direction (parallel to the material grain) where minimum attenuation occurs. Empirically, the magnitude of P-wave attenuation anisotropy is greater in fluid-saturated rocks than in dry rocks. I study the influence of fluid saturation on P-wave attenuation through synthetic modelling and compare the attenuation signature to that of dry fractured rocks. The results of the analysis show that the relaxation time strongly controls the frequency range over which attenuation occurs. The magnitude of the induced attenuation increases with polar angle and also away from the fracture strike direction. The attenuation exhibits elliptical variations with azimuth which are also well fitted with a cos2θ function. The magnitude of the attenuation anisotropy is higher in the case of the…

Subjects/Keywords: attenuation; anisotropy; fractured media; modelling

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APA (6^th Edition):

Ekanem, A. M. (2012). Analysis of P-wave attenuation anisotropy in fractured porous media. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/7621

Chicago Manual of Style (16^th Edition):

Ekanem, Aniekan Martin. “Analysis of P-wave attenuation anisotropy in fractured porous media.” 2012. Doctoral Dissertation, University of Edinburgh. Accessed October 19, 2019. http://hdl.handle.net/1842/7621.

MLA Handbook (7^th Edition):

Ekanem, Aniekan Martin. “Analysis of P-wave attenuation anisotropy in fractured porous media.” 2012. Web. 19 Oct 2019.

Vancouver:

Ekanem AM. Analysis of P-wave attenuation anisotropy in fractured porous media. [Internet] [Doctoral dissertation]. University of Edinburgh; 2012. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1842/7621.

Council of Science Editors:

Ekanem AM. Analysis of P-wave attenuation anisotropy in fractured porous media. [Doctoral Dissertation]. University of Edinburgh; 2012. Available from: http://hdl.handle.net/1842/7621

University of Toledo

21. Cyril, Nisha S. Anisotropy and Sulfide Inclusion Effects on Tensile Properties and Fatigue Behavior of Steels.

Degree: MSin Mechanical Engineering, Mechanical Engineering, 2007, University of Toledo

URL: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1198808409

► During metal forming processes such as rolling and forging, deformable sulfide inclusions become elongated. Such elongated inclusions can have considerable adverse effects on mechanical properties,… (more)

▼ During metal forming processes such as rolling and forging, deformable sulfide inclusions become elongated. Such elongated inclusions can have considerable adverse effects on mechanical properties, if the inclusions are not aligned with the loading direction. The objectives of this study were to evaluate and compare fatigue, monotonic tensile and CVN impact behavior of SAE 4140 steel with high (0.077%S), low (0.012% S) and ultra low (0.004% S) sulfur contents at two hardness levels approximately 43 HRC and 52 HRC). The longitudinally oriented samples at 40 HRC, where sulfide inclusions were oriented along the loading direction, did not exhibit any significant sensitivity of tensile or fatigue properties to the sulfur content. For the transversely oriented samples, however, the tensile ductility and the impact toughness of the high sulfur material was very low at either hardness level while the yield strength of the materials did not differ significantly with the sulfur content at either hardness level. Based on strain-life curves at 52 HRC, there was about a factor of 8 difference in fatigue life in the low cycle fatigue regime and more than an order of magnitude difference in the high cycle regime between the high S and the low S transverse materials. This difference was about a factor of 30 in the low cycle regime and about two orders of magnitude in the high cycle regime between the high S and the ultra low S materials. At 43 HRC, there was about a factor of 40 difference in short life and about one order of magnitude difference at long life between the high S and the ultra low S materials in the transverse direction. At 43 HRC, for which case longitudinal direction data were also available, little difference was noted between the low S, the ultra low S and the longitudinal materials. At 52 HRC, the high S material had a 27% lower fatigue limit than the ultra low S material under transverse loading. At 43 HRC, this reduction was 18%. SEM inspection of failed fatigue test specimens revealed that the fracture surfaces of the high S material were very rough and jagged, indicating several cracks originating from MnS inclusions at either hardness level. For the higher amplitude strain-controlled fatigue tests at both hardness levels, surface cracks that did not result in failure were found for all transverse materials indicating that the cracks initiated very early in the fatigue life. The ratios of predicted fatigue limit values using the parea parameter model proposed by Murakami et al based on inclusion inspection, to the experimental values, ranged between 0.84 and 1.29. The variations of the fatigue and tensile properties were plotted against the sulfur content and relations were obtained for the fatigue constants as functions of sulfur. The relations for the fatigue strength and ductility coefficients and exponents were expressed as functions of sulfur in the Roessle-Fatemi equation which is used to predict the strain-life curve of a steel based on only the hardness, in order to incorporate the effects of sulfur… Advisors/Committee Members: Fatemi, Ali (Advisor).

Subjects/Keywords: Engineering, Mechanical; Fatigue; Anisotropy; steels

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APA (6^th Edition):

Cyril, N. S. (2007). Anisotropy and Sulfide Inclusion Effects on Tensile Properties and Fatigue Behavior of Steels. (Masters Thesis). University of Toledo. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=toledo1198808409

Chicago Manual of Style (16^th Edition):

Cyril, Nisha S. “Anisotropy and Sulfide Inclusion Effects on Tensile Properties and Fatigue Behavior of Steels.” 2007. Masters Thesis, University of Toledo. Accessed October 19, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1198808409.

MLA Handbook (7^th Edition):

Cyril, Nisha S. “Anisotropy and Sulfide Inclusion Effects on Tensile Properties and Fatigue Behavior of Steels.” 2007. Web. 19 Oct 2019.

Vancouver:

Cyril NS. Anisotropy and Sulfide Inclusion Effects on Tensile Properties and Fatigue Behavior of Steels. [Internet] [Masters thesis]. University of Toledo; 2007. [cited 2019 Oct 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1198808409.

Council of Science Editors:

Cyril NS. Anisotropy and Sulfide Inclusion Effects on Tensile Properties and Fatigue Behavior of Steels. [Masters Thesis]. University of Toledo; 2007. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1198808409

Oregon State University

22. Anantanasakul, Pongpipat. Three-dimensional experiments and modeling of anisotropic clay.

Degree: PhD, Civil Engineering, 2010, Oregon State University

URL: http://hdl.handle.net/1957/18834

► This dissertation presents the results of a research effort conducted to better understand the stress-strain, volume change, shear band formation, and strength characteristics of normally… (more)

▼ This dissertation presents the results of a research effort conducted to better understand the stress-strain, volume change, shear band formation, and strength characteristics of normally consolidated anisotropic clay under fully three-dimensional stress states. A series of consolidated drained true triaxial tests with a constant mean effective stress and constant Lode angles during shear are performed on cross-anisotropic kaolin clay. All tests are performed in a fully automated true triaxial testing apparatus. The relative magnitude of the intermediate principal stress, expressed in terms of the b-value, and initial cross-anisotropy show significant influence on the stress-strain, volume change, strength, and shear band formation characteristics of the clay. Shear bands form and appear to cause failure in all true triaxial tests performed, except in triaxial compression. The initiation and development of shear bands is observed to take place when the clay undergoes volumetric contraction. The lower strength exhibited in the shear bands is caused by alignment of the clay particles. This shear band mechanism is different from that observed in granular materials in which the lower shear strength is reached due to dilation in the shear bands. This dissertation also presents a study on the simulative capabilities of anisotropic and isotropic elasto-plastic bounding surface models under fully three-dimensional stresses. The models assume the associated plastic flow rule and are based on bounding surface elastoplasticity and the critical state theory. The predictions of the models are compared to the stress-strain, volume change, and strength characteristics observed in drained true triaxial tests with a constant effective mean stress and constant Lode angles during shear on normally consolidated anisotropic kaolin clay. The bounding surface models can predict the influence of intermediate principal stress on the behavior of the clay but with magnitudes considerably different from those observed in the experimental results. The effects of initial cross-anisotropy on the behavior of the clay, however, cannot be fully predicted by the anisotropic bounding surface model. These incapabilities are largely due to the use of associated plastic flow rule. More realistic predictions can also be obtained by incorporating a model feature that allows bifurcation from the uniform stress-strain conditions into a localized failure mode or shear bands. This dissertation also includes the details and results of a laboratory study on the influence of non-plastic silt content on the stress-strain, volume change, and strength characteristics of transition silt-clay soils. Series of one-dimensional consolidation tests, isotropic consolidation tests, and triaxial compression tests on three soils of similar base clay but different non-plastic silt contents are performed on cross-anisotropic specimens. The specimen preparation method, testing procedure, and testing conditions of each testing type are controlled to be consistent. Both… Advisors/Committee Members: Ashford, Scott A. (advisor), Lade, Poul V. (committee member).

Subjects/Keywords: anisotropy; Clay soils – Testing

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APA (6^th Edition):

Anantanasakul, P. (2010). Three-dimensional experiments and modeling of anisotropic clay. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/18834

Chicago Manual of Style (16^th Edition):

Anantanasakul, Pongpipat. “Three-dimensional experiments and modeling of anisotropic clay.” 2010. Doctoral Dissertation, Oregon State University. Accessed October 19, 2019. http://hdl.handle.net/1957/18834.

MLA Handbook (7^th Edition):

Anantanasakul, Pongpipat. “Three-dimensional experiments and modeling of anisotropic clay.” 2010. Web. 19 Oct 2019.

Vancouver:

Anantanasakul P. Three-dimensional experiments and modeling of anisotropic clay. [Internet] [Doctoral dissertation]. Oregon State University; 2010. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/1957/18834.

Council of Science Editors:

Anantanasakul P. Three-dimensional experiments and modeling of anisotropic clay. [Doctoral Dissertation]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/18834

Universiteit Utrecht

23. Beyeler, K.K. Detect clustering in cells using Homo-FRET.

Degree: 2015, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/323190

► In this research homo-FRET was used to detect clustering of EGFR in cells. To test this method reference constructs were made containing (2x)FKBP. A wide… (more)

Subjects/Keywords: Homo-FRET FRET anisotropy FKBP

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APA (6^th Edition):

Beyeler, K. K. (2015). Detect clustering in cells using Homo-FRET. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/323190

Chicago Manual of Style (16^th Edition):

Beyeler, K K. “Detect clustering in cells using Homo-FRET.” 2015. Masters Thesis, Universiteit Utrecht. Accessed October 19, 2019. http://dspace.library.uu.nl:8080/handle/1874/323190.

MLA Handbook (7^th Edition):

Beyeler, K K. “Detect clustering in cells using Homo-FRET.” 2015. Web. 19 Oct 2019.

Vancouver:

Beyeler KK. Detect clustering in cells using Homo-FRET. [Internet] [Masters thesis]. Universiteit Utrecht; 2015. [cited 2019 Oct 19]. Available from: http://dspace.library.uu.nl:8080/handle/1874/323190.

Council of Science Editors:

Beyeler KK. Detect clustering in cells using Homo-FRET. [Masters Thesis]. Universiteit Utrecht; 2015. Available from: http://dspace.library.uu.nl:8080/handle/1874/323190

Hong Kong University of Science and Technology

24. Wang, Chunhua. Novel applications of micro-reflectance difference spectroscopy in condensed matter physics.

Degree: 2009, Hong Kong University of Science and Technology

URL: https://doi.org/10.14711/thesis-b1070399 ; http://repository.ust.hk/ir/bitstream/1783.1-6224/1/th_redirect.html

► Reflectance difference/anisotropy spectroscopy (RDS/RAS) has become a widely used technique to measure the anisotropy in materials since its development in the late 80‘s. It is… (more)

Subjects/Keywords: Condensed matter; Reflectance spectroscopy; Anisotropy

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APA (6^th Edition):

Wang, C. (2009). Novel applications of micro-reflectance difference spectroscopy in condensed matter physics. (Thesis). Hong Kong University of Science and Technology. Retrieved from https://doi.org/10.14711/thesis-b1070399 ; http://repository.ust.hk/ir/bitstream/1783.1-6224/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Chunhua. “Novel applications of micro-reflectance difference spectroscopy in condensed matter physics.” 2009. Thesis, Hong Kong University of Science and Technology. Accessed October 19, 2019. https://doi.org/10.14711/thesis-b1070399 ; http://repository.ust.hk/ir/bitstream/1783.1-6224/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Chunhua. “Novel applications of micro-reflectance difference spectroscopy in condensed matter physics.” 2009. Web. 19 Oct 2019.

Vancouver:

Wang C. Novel applications of micro-reflectance difference spectroscopy in condensed matter physics. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2009. [cited 2019 Oct 19]. Available from: https://doi.org/10.14711/thesis-b1070399 ; http://repository.ust.hk/ir/bitstream/1783.1-6224/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang C. Novel applications of micro-reflectance difference spectroscopy in condensed matter physics. [Thesis]. Hong Kong University of Science and Technology; 2009. Available from: https://doi.org/10.14711/thesis-b1070399 ; http://repository.ust.hk/ir/bitstream/1783.1-6224/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Hong Kong

25. Leung, Kam-cheung. Muon detector array to discriminate gamma-ray eas at mountainaltitude.

Degree: M. Phil., 1995, University of Hong Kong

URL: Leung, K. [梁淦章]. (1995). Muon detector array to discriminate gamma-ray eas at mountain altitude. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3121333 ; http://dx.doi.org/10.5353/th_b3121333 ; http://hdl.handle.net/10722/39348

published_or_final_version

Physics

Master

Master of Philosophy

Subjects/Keywords: Anisotropy.; Muons.

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APA (6^th Edition):

Leung, K. (1995). Muon detector array to discriminate gamma-ray eas at mountainaltitude. (Masters Thesis). University of Hong Kong. Retrieved from Leung, K. [梁淦章]. (1995). Muon detector array to discriminate gamma-ray eas at mountain altitude. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3121333 ; http://dx.doi.org/10.5353/th_b3121333 ; http://hdl.handle.net/10722/39348

Chicago Manual of Style (16^th Edition):

Leung, Kam-cheung. “Muon detector array to discriminate gamma-ray eas at mountainaltitude.” 1995. Masters Thesis, University of Hong Kong. Accessed October 19, 2019. Leung, K. [梁淦章]. (1995). Muon detector array to discriminate gamma-ray eas at mountain altitude. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3121333 ; http://dx.doi.org/10.5353/th_b3121333 ; http://hdl.handle.net/10722/39348.

MLA Handbook (7^th Edition):

Leung, Kam-cheung. “Muon detector array to discriminate gamma-ray eas at mountainaltitude.” 1995. Web. 19 Oct 2019.

Vancouver:

Leung K. Muon detector array to discriminate gamma-ray eas at mountainaltitude. [Internet] [Masters thesis]. University of Hong Kong; 1995. [cited 2019 Oct 19]. Available from: Leung, K. [梁淦章]. (1995). Muon detector array to discriminate gamma-ray eas at mountain altitude. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3121333 ; http://dx.doi.org/10.5353/th_b3121333 ; http://hdl.handle.net/10722/39348.

Council of Science Editors:

Leung K. Muon detector array to discriminate gamma-ray eas at mountainaltitude. [Masters Thesis]. University of Hong Kong; 1995. Available from: Leung, K. [梁淦章]. (1995). Muon detector array to discriminate gamma-ray eas at mountain altitude. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3121333 ; http://dx.doi.org/10.5353/th_b3121333 ; http://hdl.handle.net/10722/39348

Baylor University

26. Comiskey, Cody. Seismic anisotropy in Texas and Oklahoma and its relationship to tectonic events that shaped southern Laurentia.

Degree: Geology., 2013, Baylor University

URL: http://hdl.handle.net/2104/8819

► We present new shear wave splitting measurements of approximately 1500 SKS phases recorded at 176 broadband seismic stations deployed in Texas and Oklahoma. SKS splitting… (more)

Subjects/Keywords: Geophysics.; Seismology.; Seismic anisotropy.

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APA (6^th Edition):

Comiskey, C. (2013). Seismic anisotropy in Texas and Oklahoma and its relationship to tectonic events that shaped southern Laurentia. (Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/8819

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Comiskey, Cody. “Seismic anisotropy in Texas and Oklahoma and its relationship to tectonic events that shaped southern Laurentia. ” 2013. Thesis, Baylor University. Accessed October 19, 2019. http://hdl.handle.net/2104/8819.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Comiskey, Cody. “Seismic anisotropy in Texas and Oklahoma and its relationship to tectonic events that shaped southern Laurentia. ” 2013. Web. 19 Oct 2019.

Vancouver:

Comiskey C. Seismic anisotropy in Texas and Oklahoma and its relationship to tectonic events that shaped southern Laurentia. [Internet] [Thesis]. Baylor University; 2013. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/2104/8819.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Comiskey C. Seismic anisotropy in Texas and Oklahoma and its relationship to tectonic events that shaped southern Laurentia. [Thesis]. Baylor University; 2013. Available from: http://hdl.handle.net/2104/8819

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

27. Desser, Elizabeth M. Anisotropy beneath the Tibetan Plateau: A survey of shear wave splitting analyses.

Degree: MS, Geoscience, 2011, Penn State University

URL: https://etda.libraries.psu.edu/catalog/12604

► One of the most impressive surficial features on Earth is the Himalayan-Tibetan orogen, comprising the Himalaya Range and the associated Tibetan plateau to its northeast.… (more)

Subjects/Keywords: Tibet; anisotropy; shear wave splitting

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APA (6^th Edition):

Desser, E. M. (2011). Anisotropy beneath the Tibetan Plateau: A survey of shear wave splitting analyses. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/12604

Chicago Manual of Style (16^th Edition):

Desser, Elizabeth M. “Anisotropy beneath the Tibetan Plateau: A survey of shear wave splitting analyses.” 2011. Masters Thesis, Penn State University. Accessed October 19, 2019. https://etda.libraries.psu.edu/catalog/12604.

MLA Handbook (7^th Edition):

Desser, Elizabeth M. “Anisotropy beneath the Tibetan Plateau: A survey of shear wave splitting analyses.” 2011. Web. 19 Oct 2019.

Vancouver:

Desser EM. Anisotropy beneath the Tibetan Plateau: A survey of shear wave splitting analyses. [Internet] [Masters thesis]. Penn State University; 2011. [cited 2019 Oct 19]. Available from: https://etda.libraries.psu.edu/catalog/12604.

Council of Science Editors:

Desser EM. Anisotropy beneath the Tibetan Plateau: A survey of shear wave splitting analyses. [Masters Thesis]. Penn State University; 2011. Available from: https://etda.libraries.psu.edu/catalog/12604

Montana State University

28. Shertzer, Richard Hayden. Fabric tensors and effective properties of granular materials with application to snow.

Degree: College of Engineering, 2011, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/2264

► Granular materials e.g., gravel, sand, snow, and metallic powders are important to many engineering analysis and design problems. Such materials are not always randomly arranged,… (more)

▼ Granular materials e.g., gravel, sand, snow, and metallic powders are important to many engineering analysis and design problems. Such materials are not always randomly arranged, even in a natural environment. For example, applied strain can transform a randomly distributed assembly into a more regular arrangement. Deviations from random arrangements are described via material symmetry. A random collection exhibits textural isotropy whereas regular patterns are anisotropic. Among natural materials, snow is perhaps unique because thermal factors commonly induce microstructural changes, including material symmetry. This process temperature gradient metamorphism produces snow layers that can exhibit anisotropy. To adequately describe the behavior of such layers, mathematical models must account for potential anisotropy. This feature is absent from models specifically developed for snow, and, in most granular models in general. Material symmetry is quantified with fabric tensors in the constitutive models proposed here. Fabric tensors statistically characterize directional features in the microstructure. For example, the collective orientation of intergranular bonds impacts processes like conduction and loading. Anisotropic, microstructural models are analytically developed here for the conductivity, diffusivity, permeability, and stiffness of granular materials. The methodology utilizes homogenization an algorithm linking microscopic and macroscopic scales. Idealized geometries and constitutive assumptions are also applied at the microscopic scale. Fabric tensors tying the granular arrangement to affected material properties are a natural analysis outcome. The proposed conductivity model is compared to measured data. Dry dense snow underwent temperature gradient metamorphism in a lab. Both the measured heat transfer coefficient and a developing ice structure favored the direction of the applied gradient. Periodic tomography was used to calculate microstructural variables required by the conductivity model. Through the fabric tensor, model evolution coincides with measured changes in the heat transfer coefficient. The model also predicts a different conductivity in directions orthogonal to the gradient due to developing anisotropy. Models that do not consider directional microstructural features cannot predict such behavior because they are strictly valid for isotropic materials. The conclusions are that anisotropy in snow can be significant, fabric tensors can characterize such symmetry, and constitutive models incorporating fabric tensors offer a more complete description of material behavior. Advisors/Committee Members: Chairperson, Graduate Committee: Edward E. Adams. (advisor).

Subjects/Keywords: Anisotropy.; Granular materials.; Microstructure.; Snow.

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APA (6^th Edition):

Shertzer, R. H. (2011). Fabric tensors and effective properties of granular materials with application to snow. (Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/2264

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shertzer, Richard Hayden. “Fabric tensors and effective properties of granular materials with application to snow.” 2011. Thesis, Montana State University. Accessed October 19, 2019. https://scholarworks.montana.edu/xmlui/handle/1/2264.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shertzer, Richard Hayden. “Fabric tensors and effective properties of granular materials with application to snow.” 2011. Web. 19 Oct 2019.

Vancouver:

Shertzer RH. Fabric tensors and effective properties of granular materials with application to snow. [Internet] [Thesis]. Montana State University; 2011. [cited 2019 Oct 19]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/2264.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shertzer RH. Fabric tensors and effective properties of granular materials with application to snow. [Thesis]. Montana State University; 2011. Available from: https://scholarworks.montana.edu/xmlui/handle/1/2264

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Houston

29. Chew, Jessica M 1994-. Earth Inner Core Anisotropy as Observed by PKiKP and PKIIKP Reflected Waves.

Degree: Earth and Atmospheric Sciences, Department of, 2018, University of Houston

URL: http://hdl.handle.net/10657/3468

► The idea of Earth inner core anisotropy is well-established, and it is a very important topic in understanding the planet’s core growth, magnetic dynamo, and… (more)

▼ The idea of Earth inner core anisotropy is well-established, and it is a very important topic in understanding the planet’s core growth, magnetic dynamo, and evolution. Most data analysis techniques used to measure the anisotropy use the differential traveltimes between transmitted wave pairs, which mostly sample only shallow parts of the inner core or may be affected by mantle heterogeneities. We introduce a new method to study the effects of solely the whole inner core using a pair of reflected PKiKP and PKIIKP waves at small epicentral distances (up to 40 degrees). We take the differential traveltime between the PKiKP and PKIIKP arrivals. This differential time measures the two-way traveltime of the P-wave, which samples both the shallow and deep parts of the inner core. This observation geometry yields a clean time window in which these phases can be identified. The small epicentral distance is key to minimizing effects of small mantle heterogeneities. Data for this project include seismograms obtained from the Incorporated Research Institutions for Seismology (IRIS) database for global earthquakes from 1990 to 2016 of moment magnitudes 6.1-6.5. Seismic data were loaded into a MATLAB® GUI program to identify PKiKP-PKIIKP phase pairs at the same station. I have identified an initial set of 99 traveltime pairs from the single-trace seismograms and plotted them against latitude and longitude. No systematic change of differential time with respect to latitude was seen, which implies an anisotropy structure that is in sharp contrast to the commonly observed polar dependence anisotropy. In order to increase the signal-to-noise ratio (SNR), I stacked signals from an array of seismometers for each earthquake. From these cleaner stacked seismograms, I found 59 traveltime pairs that suggest a different view on Earth’s inner core anisotropy, which was similar to the single-trace seismogram observations. Advisors/Committee Members: Zheng, Yingcai (advisor), Lapen, Thomas (committee member), Thomsen, Leon (committee member), Suppe, John (committee member), Niu, Fenglin (committee member).

Subjects/Keywords: inner core; anisotropy; PKiKP; PKIIKP

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APA (6^th Edition):

Chew, J. M. 1. (2018). Earth Inner Core Anisotropy as Observed by PKiKP and PKIIKP Reflected Waves. (Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/3468

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chew, Jessica M 1994-. “Earth Inner Core Anisotropy as Observed by PKiKP and PKIIKP Reflected Waves.” 2018. Thesis, University of Houston. Accessed October 19, 2019. http://hdl.handle.net/10657/3468.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chew, Jessica M 1994-. “Earth Inner Core Anisotropy as Observed by PKiKP and PKIIKP Reflected Waves.” 2018. Web. 19 Oct 2019.

Vancouver:

Chew JM1. Earth Inner Core Anisotropy as Observed by PKiKP and PKIIKP Reflected Waves. [Internet] [Thesis]. University of Houston; 2018. [cited 2019 Oct 19]. Available from: http://hdl.handle.net/10657/3468.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chew JM1. Earth Inner Core Anisotropy as Observed by PKiKP and PKIIKP Reflected Waves. [Thesis]. University of Houston; 2018. Available from: http://hdl.handle.net/10657/3468

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McGill University

30. Benferrah, Mostafa. Development of anisotropy during the cold rolling of aluminium sheet.

Degree: M. Eng., Department of Mining and Metallurgical Engineering., 1986, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile72830.pdf

Subjects/Keywords: Aluminum; Anisotropy

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APA (6^th Edition):

Benferrah, M. (1986). Development of anisotropy during the cold rolling of aluminium sheet. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile72830.pdf

Chicago Manual of Style (16^th Edition):

Benferrah, Mostafa. “Development of anisotropy during the cold rolling of aluminium sheet.” 1986. Masters Thesis, McGill University. Accessed October 19, 2019. http://digitool.library.mcgill.ca/thesisfile72830.pdf.

MLA Handbook (7^th Edition):

Benferrah, Mostafa. “Development of anisotropy during the cold rolling of aluminium sheet.” 1986. Web. 19 Oct 2019.

Vancouver:

Benferrah M. Development of anisotropy during the cold rolling of aluminium sheet. [Internet] [Masters thesis]. McGill University; 1986. [cited 2019 Oct 19]. Available from: http://digitool.library.mcgill.ca/thesisfile72830.pdf.

Council of Science Editors:

Benferrah M. Development of anisotropy during the cold rolling of aluminium sheet. [Masters Thesis]. McGill University; 1986. Available from: http://digitool.library.mcgill.ca/thesisfile72830.pdf

Open Access Theses and Dissertations