publisher:"Colorado School of Mines"

Colorado School of Mines

1. Card, Christopher Tyler. Qualitative image based localization in a large building.

Degree: 2015, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1587434

► Interest in indoor localization is growing because it is an important component of many applications (e.g. augmented reality, customer navigation). Image-based localization, using naturally-occurring… (more)

Subjects/Keywords: Computer Science

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APA (6^th Edition):

Card, C. T. (2015). Qualitative image based localization in a large building. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1587434

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):

Card, Christopher Tyler. “Qualitative image based localization in a large building.” 2015. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=1587434.

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

MLA Handbook (7^th Edition):

Card, Christopher Tyler. “Qualitative image based localization in a large building.” 2015. Web. 20 Jan 2019.

Vancouver:

Card CT. Qualitative image based localization in a large building. [Internet] [Thesis]. Colorado School of Mines; 2015. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1587434.

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

Council of Science Editors:

Card CT. Qualitative image based localization in a large building. [Thesis]. Colorado School of Mines; 2015. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1587434

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

Colorado School of Mines

2. Kohnke, Colton J. Electromagnetic effects of steel-cased wells.

Degree: 2017, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10254924

► In oil and gas production environments, controlled-source electromagnetics can be used to aid brownfield exploration, development, and reservoir monitoring efforts. However, such environments typically… (more)

Subjects/Keywords: Geophysics; Geophysical engineering; Electromagnetics

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APA (6^th Edition):

Kohnke, C. J. (2017). Electromagnetic effects of steel-cased wells. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10254924

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):

Kohnke, Colton J. “Electromagnetic effects of steel-cased wells.” 2017. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10254924.

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

MLA Handbook (7^th Edition):

Kohnke, Colton J. “Electromagnetic effects of steel-cased wells.” 2017. Web. 20 Jan 2019.

Vancouver:

Kohnke CJ. Electromagnetic effects of steel-cased wells. [Internet] [Thesis]. Colorado School of Mines; 2017. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10254924.

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

Council of Science Editors:

Kohnke CJ. Electromagnetic effects of steel-cased wells. [Thesis]. Colorado School of Mines; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10254924

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

Colorado School of Mines

3. Lozano, Eduardo. Design and analysis of a personnel blast shield for different explosives applications.

Degree: 2016, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10157345

► The use of explosives brings countless benefits to our everyday lives in areas such as mining, oil and gas exploration, demolition, and avalanche control.… (more)

Subjects/Keywords: Mechanical engineering; Physics

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APA (6^th Edition):

Lozano, E. (2016). Design and analysis of a personnel blast shield for different explosives applications. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10157345

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):

Lozano, Eduardo. “Design and analysis of a personnel blast shield for different explosives applications.” 2016. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10157345.

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

MLA Handbook (7^th Edition):

Lozano, Eduardo. “Design and analysis of a personnel blast shield for different explosives applications.” 2016. Web. 20 Jan 2019.

Vancouver:

Lozano E. Design and analysis of a personnel blast shield for different explosives applications. [Internet] [Thesis]. Colorado School of Mines; 2016. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10157345.

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

Council of Science Editors:

Lozano E. Design and analysis of a personnel blast shield for different explosives applications. [Thesis]. Colorado School of Mines; 2016. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10157345

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

Colorado School of Mines

4. McClave, Graham A. Stratigraphy and source rock analyses of the Heath Formation in Fergus, Garfield, Golden Valley, Musselshell, Petroleum, and Rosebud counties, central Montana.

Degree: 2013, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1529698

► The Mississippian Heath Formation is recognized as the key source rock for the Heath-Tyler-Amsden (!) petroleum system in the Big Snowy Trough of central… (more)

▼ The Mississippian Heath Formation is recognized as the key source rock for the Heath-Tyler-Amsden (!) petroleum system in the Big Snowy Trough of central Montana which has produced an estimated 137 million bbl of oil to date from conventional traps. Due to the limited amount of conventional production to date within this petroleum system over the region's 90 year history of development, and estimates that 60% of total generated oil still remains in place within the source rock, the Heath is well suited for being assessed as a resource play. This research project is designed around addressing this possibility. Specifically it seeks to gain a thorough understanding of the Heath's potential as a resource play, and does this by meeting two primary objectives: 1) conducting a petroleum system analysis of regional stratigraphy in the Big Snowy Trough of central Montana with an emphasis toward identifying the Mississippian Heath Formation's contribution to this system, and 2) performing a source rock assessment of the Heath Formation. The results drawn from meeting these objectives lead to establishing the view of the Heath as its own stand-alone petroleum system that can potentially serve as a resource play target. The stratigraphic analysis yielded the following observations. Thickness of the Heath varies regionally from 150-450 ft, and its present depth ranges from outcropping at the surface to occurring at 6,000 ft total vertical depth, while averaging around 3,000-6,000 ft within the central region of the trough. It is composed of various marine lithologies including mostly black micritic shale interbedded with thin fossiliferous limestone and dolomite stringers, and minor gypsum/anhydrite occurrences. The most organic-rich zone of the Heath, the Cox Ranch shale unit, ranges from 5-25 ft in thickness, and is composed of finely-laminated micritic black shale. Adjacent to this organic zone is the informally defined Heath B carbonate unit (from this study) which is composed of interbedded limestone, dolomite and shale. The carbonate beds within this interval are thin (2-5 ft thick), but generally are more developed and more prevalent in the southern region of the study area. Less organic-rich shale intervals occur abundantly in the Upper and Lower Heath units that are informally defined in this study. The source rock analysis provided the following results. Programmed pyrolysis, TOC, and vitrinite reflectance data for the Heath shales indicate very good source rock character. Within the Cox Ranch section, TOC wt. % ranges from 0.5-26% and averages 9% with S2 peak values averaging 20 mg HC/g rock. Kerogen type analyses point mainly to Type I/Type II kerogen, while Tmax suggests marginal maturity to oil window maturity with values ranging from 420 to 449 deg C. Maps of the thermal maturity parameters indicate a salient zone of oil maturity in the south-central region of the study area. Burial history and thermal maturity models from southern wells indicate oil expulsion from the Heath with…

Subjects/Keywords: Geology; Petroleum Geology; Sedimentary Geology

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APA (6^th Edition):

McClave, G. A. (2013). Stratigraphy and source rock analyses of the Heath Formation in Fergus, Garfield, Golden Valley, Musselshell, Petroleum, and Rosebud counties, central Montana. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1529698

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):

McClave, Graham A. “Stratigraphy and source rock analyses of the Heath Formation in Fergus, Garfield, Golden Valley, Musselshell, Petroleum, and Rosebud counties, central Montana.” 2013. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=1529698.

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

MLA Handbook (7^th Edition):

McClave, Graham A. “Stratigraphy and source rock analyses of the Heath Formation in Fergus, Garfield, Golden Valley, Musselshell, Petroleum, and Rosebud counties, central Montana.” 2013. Web. 20 Jan 2019.

Vancouver:

McClave GA. Stratigraphy and source rock analyses of the Heath Formation in Fergus, Garfield, Golden Valley, Musselshell, Petroleum, and Rosebud counties, central Montana. [Internet] [Thesis]. Colorado School of Mines; 2013. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1529698.

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

Council of Science Editors:

McClave GA. Stratigraphy and source rock analyses of the Heath Formation in Fergus, Garfield, Golden Valley, Musselshell, Petroleum, and Rosebud counties, central Montana. [Thesis]. Colorado School of Mines; 2013. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1529698

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

Colorado School of Mines

5. Hurley, Christoph. Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding.

Degree: 2013, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1533025

► The ability to accurately measure and predict the velocity of explosively driven flyer plates has been a subject of significant work by the explosives… (more)

Subjects/Keywords: Engineering, Mining; Engineering, Materials Science

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APA (6^th Edition):

Hurley, C. (2013). Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1533025

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):

Hurley, Christoph. “Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding.” 2013. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=1533025.

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

MLA Handbook (7^th Edition):

Hurley, Christoph. “Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding.” 2013. Web. 20 Jan 2019.

Vancouver:

Hurley C. Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding. [Internet] [Thesis]. Colorado School of Mines; 2013. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1533025.

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

Council of Science Editors:

Hurley C. Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding. [Thesis]. Colorado School of Mines; 2013. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1533025

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

Colorado School of Mines

6. Tello Araya, Karem E. Phase transformations and equilibria of titanium platinum alloys in the composition range 30-50 atomic percent platinum.

Degree: 2012, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3546038

► The Ti-Pt phase binary phase diagram and the corresponding phase transformations in the composition range 30-50 at.% Pt have been investigated using a variety… (more)

▼ The Ti-Pt phase binary phase diagram and the corresponding phase transformations in the composition range 30-50 at.% Pt have been investigated using a variety of characterization methods (DTA, SEM and TEM). This study was inspired by ongoing work on some experimental Ti-Ni-Pt and Ti-Pt-Ni-Hf high temperature shape memory alloys that were found to contain unexpected phases not reported previously in such alloys. Furthermore, close analysis of the peritectoid invariant proposed by Biggs et al. revealed a range of confusing and somewhat contradictory results and, as a result, it was decided to attempt to determine the true nature of the diagram in this composition range and to understand the complicating effects of interstitial contamination on the observed microstructures and phase equilibria. The microstructure of as-cast and heat treated alloys contains more than two phases after equilibration treatments suggesting interstitial contamination. In addition, the microstructures revealed that the peritectoid transformation (Ti₃Pt+β-TiPt[special characters omitted]Ti₄Pt₃) proposed in the literature exists but, because of sluggish transformation kinetics, the actual peritectoid reaction is limited and does not account for the observed DTA peaks that Biggs et al. used to estimate the invariant temperature. Rather, it will be shown that the peaks are due to the transformation of β-TiPt to a lamellar β-TiPt+Ti₄Pt₃ structure at approximately 1230 °C. In addition, a modification to the phase diagram is proposed based on other experimental evidence. Characterization of the various phases observed in the microstructures (using SADP and CBED in the TEM) confirmed the presence of the known phases Ti₃Pt and α-TiPt. In addition, a new phase with stoichiometry Ti₅Pt₃ was observed in both as-cast and heat treated samples. This phase is shown to be stabilized by oxygen and to have a hexagonal structure with lattice parameters a ∼ 8.0 nm and c ∼ 5.0 nm (space group P6₃/mcm). The Ti₄Pt₃ phase appears to be a true binary phase that tends to be highly faulted and be structurally related to the Ti₅Pt₃ phase with a pseudo-hexagonal structure with a ∼ 7.96 nm and c ∼ 23.6 nm. Detailed electron diffraction evidence indicates that the crystal structure is probably triclinic although it was difficult to determine the actual point and space group.

Subjects/Keywords: Engineering; Materials Science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tello Araya, K. E. (2012). Phase transformations and equilibria of titanium platinum alloys in the composition range 30-50 atomic percent platinum. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3546038

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):

Tello Araya, Karem E. “Phase transformations and equilibria of titanium platinum alloys in the composition range 30-50 atomic percent platinum.” 2012. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=3546038.

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

MLA Handbook (7^th Edition):

Tello Araya, Karem E. “Phase transformations and equilibria of titanium platinum alloys in the composition range 30-50 atomic percent platinum.” 2012. Web. 20 Jan 2019.

Vancouver:

Tello Araya KE. Phase transformations and equilibria of titanium platinum alloys in the composition range 30-50 atomic percent platinum. [Internet] [Thesis]. Colorado School of Mines; 2012. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3546038.

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

Council of Science Editors:

Tello Araya KE. Phase transformations and equilibria of titanium platinum alloys in the composition range 30-50 atomic percent platinum. [Thesis]. Colorado School of Mines; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3546038

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

Colorado School of Mines

7. Worrall, Dan M., Jr. Modeling gas flows in longwall coal mines using computational fluid dynamics.

Degree: 2012, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3546041

► Longwall coal mines have been a major and growing source of coal production in the United States for decades. The geological and geochemical nature… (more)

▼ Longwall coal mines have been a major and growing source of coal production in the United States for decades. The geological and geochemical nature of coal seams means that methane is frequently present in the coal and surrounding strata of longwall mines. The human coal miners require oxygen to work in these environments, so complex ventilation systems are developed to deliver fresh air to the underground mine. An additional goal of the ventilation system is to prevent explosive mixtures of methane and oxygen from forming in the mine, including within the gob. A computational fluid dynamics (CFD) model was created that accurately simulates the mixing of gases in longwall coal gobs. The longwall panel model simulated the phase leading up to and including shield recovery and therefore examines the ventilation and hazards during that phase of the operation. Special attention was paid to the interaction of gases in the gob, a rubblized zone of rock, potentially methane rich, that is created as the longwall retreats. In order to accurately model behavior, a parallel research used a commercial software package to predict the permeability and porosity of the gob (Wachel, 2012). When coupled with FLUENT, a commercially available CFD software package, a flow model was created that calculated gas concentrations which matched several known monitoring sites in a currently operating longwall mine. Qualitatively, the model's predictions also appeared to conform to observed operating conditions giving further confidence in the model. The validated model framework was used to run many hundreds of simulations. The results of the completed simulations support a number of conclusions. This research suggests that progressively sealed, bleederless longwall panels should strive to maximize nitrogen injection into the headgate side of the panel without creating unsafe low oxygen concentrations in the tailgate return. Nitrogen injected in the tailgate of the panel had a much lower impact on gob safety, but is likely still necessary to sweep the tailgate entries separated from the ventilation system by isolation stoppings as the face advances. The second recommendation of this research is that, while the general shield recovery process used by bleederless longwall panels appears safe, nitrogen should be injected behind the shields in the center of the ventilation circuit to mitigate the hazard created by the build up of high methane environments in the gob immediately behind the shields. Finally, the results suggest that minimizing the concentration of methane in the tailgate return does not always ensure that the optimum methane concentration for the entire longwall gob is being achieved.

Subjects/Keywords: Engineering, Mechanical; Engineering, Mining

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APA (6^th Edition):

Worrall, Dan M., J. (2012). Modeling gas flows in longwall coal mines using computational fluid dynamics. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3546041

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):

Worrall, Dan M., Jr. “Modeling gas flows in longwall coal mines using computational fluid dynamics.” 2012. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=3546041.

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

MLA Handbook (7^th Edition):

Worrall, Dan M., Jr. “Modeling gas flows in longwall coal mines using computational fluid dynamics.” 2012. Web. 20 Jan 2019.

Vancouver:

Worrall, Dan M. J. Modeling gas flows in longwall coal mines using computational fluid dynamics. [Internet] [Thesis]. Colorado School of Mines; 2012. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3546041.

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

Council of Science Editors:

Worrall, Dan M. J. Modeling gas flows in longwall coal mines using computational fluid dynamics. [Thesis]. Colorado School of Mines; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3546041

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

Colorado School of Mines

8. Alkuwairan, Maryam Y. Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait.

Degree: 2013, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3549853

► The origin of dolomite has been enigmatic. It is a common constituent of carbonate hydrocarbon reservoirs, it is abundant in Phanerozoic sedimentary carbonate rocks,… (more)

▼ The origin of dolomite has been enigmatic. It is a common constituent of carbonate hydrocarbon reservoirs, it is abundant in Phanerozoic sedimentary carbonate rocks, but dolomite is rare in Quaternary and Recent rocks. Many different models have been suggested to explain its origin. Authigenic dolomite has been found to be forming in the Persian Gulf, but rather in small quantities. Additionally, mixing of authigenic dolomite with allochthonous types has been difficult to characterize. While it is clear that dolomite forms under a wide range of geochemical conditions, this study focuses on the occurrence of dolomite in modern sediments in a restricted embayment (Kuwait Bay), whose sediments derive from multiple sources. In this study, recently developed quantitative mineralogical tools (QEMSCAN analyses) were used in conjunction with traditional approaches (XRD, SEM, whole-rock geochemistry, and isotope geochemistry) to characterize polygenetic dolomite types occurring in subtidal sediments in Kuwait Bay. This study is the first to employ these methods to characterize the sediment mineralogy and geochemistry. Dolomite occurs as both authigenic and detrital phases, and analytical techniques have allowed characterization of these different types of dolomite. Three distinct phases of dolomite are present in the sediments: stoichiometric dolomite, near-stoichiometric dolomite, and calcium-rich, poorly ordered dolomite (protodolomite). The data suggest that stoichiometric and near-stoichiometric dolomite are transported (allochthonous/detrital), while the protodolomite is most likely an in situ authigenic precipitate. Allochthonous/detrital dolomite occurs within composite grains that show evidence for transportation. They are typically in the 50 to 150 &mgr;m size fraction. The mineralogic composition and characteristics of the composite grains suggests two likely sources: eolian and fluvial. These detrital dolomites are extrabasinally sourced. However, isolated rhombohedra of pristine dolomite crystals are present in the sediments. These dolomite rhombs are typically less than 10 &mgr;m in diameter, and are calcium rich. They make up about 10% of the total dolomite in the sediments. Their origin is consistent with authigenic microbially mediated dolomite precipitation in organic-rich sediments in hypersaline waters.

Subjects/Keywords: Geology; Mineralogy; Marine Geology; Sedimentary Geology

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APA (6^th Edition):

Alkuwairan, M. Y. (2013). Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3549853

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):

Alkuwairan, Maryam Y. “Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait.” 2013. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=3549853.

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

MLA Handbook (7^th Edition):

Alkuwairan, Maryam Y. “Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait.” 2013. Web. 20 Jan 2019.

Vancouver:

Alkuwairan MY. Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait. [Internet] [Thesis]. Colorado School of Mines; 2013. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3549853.

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

Council of Science Editors:

Alkuwairan MY. Polygenetic dolomite in subtidal sediments of northern Kuwait Bay, Kuwait. [Thesis]. Colorado School of Mines; 2013. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3549853

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

Colorado School of Mines

9. Ikard, Scott. Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams.

Degree: 2014, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3602502

► A monitoring methodology is developed for investigating seepage and internal erosion in earthen dams with time-lapse measurements of self-potential anomalies associated with conservative salt… (more)

Subjects/Keywords: Hydrology; Engineering, Geological; Engineering, Geophysical

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APA (6^th Edition):

Ikard, S. (2014). Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3602502

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):

Ikard, Scott. “Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams.” 2014. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=3602502.

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

MLA Handbook (7^th Edition):

Ikard, Scott. “Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams.” 2014. Web. 20 Jan 2019.

Vancouver:

Ikard S. Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams. [Internet] [Thesis]. Colorado School of Mines; 2014. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3602502.

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

Council of Science Editors:

Ikard S. Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams. [Thesis]. Colorado School of Mines; 2014. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3602502

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

Colorado School of Mines

10. Faber, Ethan J. Development of a landslide risk rating system for small-scale landslides affecting settlements in Guatemala City.

Degree: 2016, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10014960

► Many settlements in the Guatemala City Metropolitan Area (GCMA) face significant possibilities of fatalities due to their location in steep ravines that are subjected… (more)

▼ Many settlements in the Guatemala City Metropolitan Area (GCMA) face significant possibilities of fatalities due to their location in steep ravines that are subjected to periodic large-scale landslides. Since the housing in the at-risk areas is relatively low-cost, it is typically cost-prohibitive to mitigate the risk to an acceptable level. Thus, permanent relocation is the only truly viable option to ensure the long-term safety of everyone. However, there are several economic and social obstacles impeding successful implementation of a relocation program. Still, there are many other landslide risk reduction techniques (such as retaining walls, community drainage systems, and alert systems) implemented by government organizations and non-profit groups. These techniques are helpful in landslide risk reduction (LRR), but residents are only partially involved in the entire process. Therefore, increasing residents’ education and ability to better understand their level of landslide risk will help with LRR. Residents can integrate and collaborate with the government organizations and non-profits implementing mitigation techniques and of even greater benefits, the education and ability for residents to understand their landslide risk can provide additional avenues for LRR not otherwise achievable. The purpose of this research is to develop a landslide-risk-rating-system (LRRS) that can be used by trained residents to better understand their risk (similar to other landslide or rockfall hazard-rating systems commonly used by department of transportation organizations). The focus of this LRRS is only on small-scale landslides (typically the size of a house or less) because evaluating the risk of large-scale landslides is too complicated to be done by trained non-technical experts. The LRRS asks questions related to landslide risk that can be used to calculate a landslide risk score to indicate the relative level of risk. The LRRS was created by reviewing published literature documenting other landslide rating systems and incorporating similar factors correlated with landslide risk. Then, forty sites were visited in the GCMA to inventory the factors at houses that are vulnerable to landslides in order to evaluate which factors were most useful for predicting the relative risk. The predicted risk scores were compared to ranked risk scores estimated by the author to ensure the results were valid. Statistical analysis identified which of these factors best-predicted landslide risk. These factors include slope angle, slope height, strength of slope material or material type, aperture of cracks, spatial impact, largest probable landslide volume, largest probable percentage of the living area that could be impacted from a landslide, and total person-hours a living area is occupied per day. Future work should focus on the transformation of the tool into a more user-friendly format for use by residents, the implementation process, and monitoring plan.

Subjects/Keywords: Geological engineering

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APA (6^th Edition):

Faber, E. J. (2016). Development of a landslide risk rating system for small-scale landslides affecting settlements in Guatemala City. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10014960

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):

Faber, Ethan J. “Development of a landslide risk rating system for small-scale landslides affecting settlements in Guatemala City.” 2016. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10014960.

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

MLA Handbook (7^th Edition):

Faber, Ethan J. “Development of a landslide risk rating system for small-scale landslides affecting settlements in Guatemala City.” 2016. Web. 20 Jan 2019.

Vancouver:

Faber EJ. Development of a landslide risk rating system for small-scale landslides affecting settlements in Guatemala City. [Internet] [Thesis]. Colorado School of Mines; 2016. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10014960.

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

Council of Science Editors:

Faber EJ. Development of a landslide risk rating system for small-scale landslides affecting settlements in Guatemala City. [Thesis]. Colorado School of Mines; 2016. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10014960

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

Colorado School of Mines

11. Charlesworth, Alexander E. A class of staggered grid algorithms and analysis for time-domain Maxwell systems.

Degree: 2016, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10010857

► We describe, implement, and analyze a class of staggered grid algorithms for efficient simulation and analysis of time-domain Maxwell systems in the case of… (more)

Subjects/Keywords: Applied mathematics; Electromagnetics

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APA (6^th Edition):

Charlesworth, A. E. (2016). A class of staggered grid algorithms and analysis for time-domain Maxwell systems. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10010857

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):

Charlesworth, Alexander E. “A class of staggered grid algorithms and analysis for time-domain Maxwell systems.” 2016. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10010857.

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

MLA Handbook (7^th Edition):

Charlesworth, Alexander E. “A class of staggered grid algorithms and analysis for time-domain Maxwell systems.” 2016. Web. 20 Jan 2019.

Vancouver:

Charlesworth AE. A class of staggered grid algorithms and analysis for time-domain Maxwell systems. [Internet] [Thesis]. Colorado School of Mines; 2016. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10010857.

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

Council of Science Editors:

Charlesworth AE. A class of staggered grid algorithms and analysis for time-domain Maxwell systems. [Thesis]. Colorado School of Mines; 2016. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10010857

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

Colorado School of Mines

12. McNichols, Brett William. Synthesis and Application of Styryl Phosphonic and Cinnamic Acid Derivatives.

Degree: 2017, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10624231

► Styryl phosphonic and cinnamic acid derivatives have been gaining attention as key candidates to modulate specific electrode properties in organic electronic devices such as… (more)

▼ Styryl phosphonic and cinnamic acid derivatives have been gaining attention as key candidates to modulate specific electrode properties in organic electronic devices such as work function, surface energies, wettability, and electron charge transfer kinetics that lead to increased efficiency, operational range, and device lifetimes. Very few of these acids are commercially available. The driving factor behind this research is to explore simple, high yield, and inexpensive synthetic routes towards synthesis of these acids. Herein, the novel synthesis of vinyl phosphonic acids (VPAs) and their subsequent influence on interface properties compared to their phenyl phosphonic acids (PPAs) and benzyl phosphonic acids (BPAs) analogues are explored. This includes an in depth comparison of varying polar VPA, BPA, and PPA “families” attachment on conductive oxides as they allow for careful work function tuning of band edge energy and chemical properties on these surfaces. By leveraging similar techniques of VPA synthesis we can produce analogous cinnamic acids in which these same surface control concepts are applied on the surface of lead sulfide (PbS) colloidal semiconductor nano-crystals, or quantum dots (QDs). In order to do this, first a development of a simple solution-phase ligand exchange was necessary, from which we selectively replace native solubilizing ligands with these fictionalized cinnamic acids. This application achieved remarkable control allowing the band edge position to be tuned over an unprecedented 2.0 eV. This cinnamic acid synthetic chemistry can then be extended to functionalize multi acrylate containing molecules creating organic linkers to be integrated into Metal Organic Frameworks (MOFs). MOFs have increasingly gained attention for many high impact applications including but not limited to catalysis, gas storage and release, sensors, energy harvesting, conductivity, and filtration. A great amount of research is presently being conducted in developing new MOFs from the same handful of commercially available linkers. We introduce synthetic techniques for 18 isoreticular series of linkers that can be formulated with similar, if not identical, conditions giving way to the formation of previously unknown frameworks. This technique led us to incorporate a number of these linkers into Ni-MOFs and investigate catalytic activity for conversion of oleic acid to liquid hydrocarbons.

Subjects/Keywords: Organic chemistry

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APA (6^th Edition):

McNichols, B. W. (2017). Synthesis and Application of Styryl Phosphonic and Cinnamic Acid Derivatives. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10624231

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):

McNichols, Brett William. “Synthesis and Application of Styryl Phosphonic and Cinnamic Acid Derivatives.” 2017. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10624231.

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

MLA Handbook (7^th Edition):

McNichols, Brett William. “Synthesis and Application of Styryl Phosphonic and Cinnamic Acid Derivatives.” 2017. Web. 20 Jan 2019.

Vancouver:

McNichols BW. Synthesis and Application of Styryl Phosphonic and Cinnamic Acid Derivatives. [Internet] [Thesis]. Colorado School of Mines; 2017. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10624231.

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

Council of Science Editors:

McNichols BW. Synthesis and Application of Styryl Phosphonic and Cinnamic Acid Derivatives. [Thesis]. Colorado School of Mines; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10624231

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

Colorado School of Mines

13. Geesaman, Patrick J. Structural observations and stratigraphic variability in Jurassic strata, Upheaval Dome, Canyonlands National Park, Utah, USA.

Degree: 2014, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1549082

► Upheaval Dome is a structurally deformed topographic depression located in Canyonlands National Park, southeast Utah. Multiple hypotheses for its origin have been proposed by… (more)

▼ Upheaval Dome is a structurally deformed topographic depression located in Canyonlands National Park, southeast Utah. Multiple hypotheses for its origin have been proposed by various scientists over many years of research. The two remaining viable hypotheses are at opposite ends of the geologic spectrum, one proposing long-term deformation of the structure, while the other proposes a catastrophic meteorite impact. (1) The seminal paper by Jackson et al. (1998) suggests that Upheaval Dome was created due to the growth and subsequent pinch-off of a salt diapir sourced from the Pennsylvanian Paradox Formation. Their conclusions were based on various growth geometries in Jurassic age strata. (2) Perhaps the most influential paper proposing a meteorite impact at Upheaval Dome is by Buchner and Kenkmann (2008), titled "Upheaval Dome, Utah, USA: Impact origin confirmed". In this paper only two grains of shocked quartz are identified, out of 120 standard thin sections. Based on these thin sections comprising medium-coarse sand grains, only ~0.00043% of grains displayed evidence of high-pressure deformation. For shocked quartz to confirm a meteorite impact there must be abundant shocked grains (2-5%), and ~0.00043% cannot be considered abundant (French and Koeberl, 2010). Prior to this study there has been no attempt made to combine an in depth stratigraphic investigation of exposed, accessible formations with structural and lithologic observations in the Upheaval Dome area. Analysis of stratigraphic field data for Triassic to Jurassic-aged strata reveals: (1) stratigraphic thicknesses from measured sections range from 7 meters to 224 meters in the Kayenta Formation, and projected thicknesses in cross sections can exceed 400 meters; (2) distinct changes in facies distributions in relation to mapped structural features; (3) localized angular discordances, such as angular unconformities and onlaps, at the contact between formations or within individual formations. Analysis of structural features at Upheaval Dome reveals: (1) synclinal axes and associated depositional centers shift throughout the Jurassic; (2) stratigraphic thicknesses across normal faults from hanging to footwall blocks are unequal on the scale of meters to tens of meters; (3) thrust faults verge dominantly to the southeast regardless of the side of the dome they are located on; (4) blocks of Triassic Chinle Formation encased in the younger Jurassic Wingate Sandstone adjacent to dog tongues suggests the involvement of a brief period of allochthonous salt break out after the deposition of the Chinle. Petrographic analysis was inconclusive, as there were no shocked grains, nor any clasts of the Paradox Formation present in younger formations. The research presented in this study strongly indicates that long-term deformation occurred at Upheaval Dome during the Early Jurassic and possibly in older less well exposed units. Evidence supporting long-term deformation includes growth strata, changes in facies distributions, shifting…

Subjects/Keywords: Geology

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APA (6^th Edition):

Geesaman, P. J. (2014). Structural observations and stratigraphic variability in Jurassic strata, Upheaval Dome, Canyonlands National Park, Utah, USA. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1549082

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):

Geesaman, Patrick J. “Structural observations and stratigraphic variability in Jurassic strata, Upheaval Dome, Canyonlands National Park, Utah, USA.” 2014. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=1549082.

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

MLA Handbook (7^th Edition):

Geesaman, Patrick J. “Structural observations and stratigraphic variability in Jurassic strata, Upheaval Dome, Canyonlands National Park, Utah, USA.” 2014. Web. 20 Jan 2019.

Vancouver:

Geesaman PJ. Structural observations and stratigraphic variability in Jurassic strata, Upheaval Dome, Canyonlands National Park, Utah, USA. [Internet] [Thesis]. Colorado School of Mines; 2014. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1549082.

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

Council of Science Editors:

Geesaman PJ. Structural observations and stratigraphic variability in Jurassic strata, Upheaval Dome, Canyonlands National Park, Utah, USA. [Thesis]. Colorado School of Mines; 2014. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1549082

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

Colorado School of Mines

14. Doe, Michael Frederick. Reassessment of Paleo- and Mesoproterozoic basin sediments of Arizona| Implications for tectonic growth of southern Laurentia and global tectonic configurations.

Degree: 2014, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3622903

► Proterozoic crustal provinces that underlie much of the United States record prolonged southward growth of the North American craton (Laurentia) between ca. 1.8 and… (more)

▼ Proterozoic crustal provinces that underlie much of the United States record prolonged southward growth of the North American craton (Laurentia) between ca. 1.8 and 1.0 Ga. Exposures throughout central Arizona's Tonto Basin represent multiple generations of sedimentary basins formed during Proterozoic accretion. Metasedimentary rocks sampled across Tonto Basin resulted have identified remnants of a previously undated but potentially widespread Mesoproterozoic basin called the Yankee Joe Basin. Sediments of Yankee Joe Basin are particularly interesting because they have depositional age's ca. 200 m.y. younger than previously thought and because they are rich in detrital zircons with ages between 1.6-1.48 Ga, a time period not widely represented in the igneous record of Laurentia. Metasedimentary rocks with similar age and provenance are found in northern New Mexico and in the lower parts of the Belt Supergroup in northern Idaho, Montana, and Canada. Zircon ages and Hf isotopic characteristics suggest the distinctive 1.6-1.48 Ga grains might have been derived from non-Laurentian sources, most likely one or more formerly adjacent cratons such as north Australia. Circa 1.48-1.43 Ga units in the Yankee Joe Basin rest disconformably on Paleoproterozoic quartzite, and all were deformed together during northwest-directed foreland-style thrusting. This event was previously interpreted to represent the ca. 1.66-1.60 Ga Mazatzal orogeny. However, new findings challenge this view and suggest a major deformation event occurred ca. 1.47-1.45 Ga, possibly representing the Picuris orogeny as recently described in northern New Mexico. Regional thrust faulting during the Mesoproterozoic might have unroofed and removed significant portions of the Yankee Joe section, potentially shedding detritus north from the thrust front into the upper parts of the Belt-Purcell basin. Detrital zircon ages and hafnium isotope compositions provide a critical test of sediment provenance and depositional age and were used to reassess sedimentary age and sources multiple Proterozoic unconformity-bound metasedimentary successions exposed across Arizona. These successions represent a series of ca. 1.75 to 1.3 Ga basins that span the Proterozoic accretionary provinces of southwestern Laurentia, representing key elements in the tectonic evolution of the continental margin. The ca. 1.75 Ga Vishnu Schist contains a bimodal detrital zircon age distribution with prominent Archean (2.5 Ga) and Early Paleoproterozoic (1.8 Ga) populations and minor juvenile 1.75 Ga input. The predominance of 3.3-1.8 Ga detrital zircon ages and initial epsilon Hf (ϵHf) values of +4 to -13 in both detrital grains of the Vishnu Schist and xenocrystic grains in plutons from cross-cutting plutons suggests the Vishnu Schist was derived primarily from recycling of the Mojave and other older basement provinces, possibly including one or more outboard cratons. In contrast, the ca. 1.74-1.72 Ga Jerome and ca. 1.72 Ga Alder successions of central Arizona, show a marked…

Subjects/Keywords: Geology; Plate Tectonics

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APA (6^th Edition):

Doe, M. F. (2014). Reassessment of Paleo- and Mesoproterozoic basin sediments of Arizona| Implications for tectonic growth of southern Laurentia and global tectonic configurations. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3622903

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):

Doe, Michael Frederick. “Reassessment of Paleo- and Mesoproterozoic basin sediments of Arizona| Implications for tectonic growth of southern Laurentia and global tectonic configurations.” 2014. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=3622903.

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

MLA Handbook (7^th Edition):

Doe, Michael Frederick. “Reassessment of Paleo- and Mesoproterozoic basin sediments of Arizona| Implications for tectonic growth of southern Laurentia and global tectonic configurations.” 2014. Web. 20 Jan 2019.

Vancouver:

Doe MF. Reassessment of Paleo- and Mesoproterozoic basin sediments of Arizona| Implications for tectonic growth of southern Laurentia and global tectonic configurations. [Internet] [Thesis]. Colorado School of Mines; 2014. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3622903.

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

Council of Science Editors:

Doe MF. Reassessment of Paleo- and Mesoproterozoic basin sediments of Arizona| Implications for tectonic growth of southern Laurentia and global tectonic configurations. [Thesis]. Colorado School of Mines; 2014. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3622903

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

Colorado School of Mines

15. Fisher, Wendy D. Machine learning for the automatic detection of anomalous events.

Degree: 2017, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10258193

► In this dissertation, we describe our research contributions for a novel approach to the application of machine learning for the automatic detection of anomalous… (more)

▼ In this dissertation, we describe our research contributions for a novel approach to the application of machine learning for the automatic detection of anomalous events. We work in two different domains to ensure a robust data-driven workflow that could be generalized for monitoring other systems. Specifically, in our first domain, we begin with the identification of internal erosion events in earth dams and levees (EDLs) using geophysical data collected from sensors located on the surface of the levee. As EDLs across the globe reach the end of their design lives, effectively monitoring their structural integrity is of critical importance. The second domain of interest is related to mobile telecommunications, where we investigate a system for automatically detecting non-commercial base station routers (BSRs) operating in protected frequency space. The presence of non-commercial BSRs can disrupt the connectivity of end users, cause service issues for the commercial providers, and introduce significant security concerns. We provide our motivation, experimentation, and results from investigating a generalized novel data-driven workflow using several machine learning techniques. In Chapter 2, we present results from our performance study that uses popular unsupervised clustering algorithms to gain insights to our real-world problems, and evaluate our results using internal and external validation techniques. Using EDL passive seismic data from an experimental laboratory earth embankment, results consistently show a clear separation of events from non-events in four of the five clustering algorithms applied. Chapter 3 uses a multivariate Gaussian machine learning model to identify anomalies in our experimental data sets. For the EDL work, we used experimental data from two different laboratory earth embankments. Additionally, we explore five wavelet transform methods for signal denoising. The best performance is achieved with the Haar wavelets. We achieve up to 97.3% overall accuracy and less than 1.4% false negatives in anomaly detection. In Chapter 4, we research using two-class and one-class support vector machines (SVMs) for an effective anomaly detection system. We again use the two different EDL data sets from experimental laboratory earth embankments (each having approximately 80% normal and 20% anomalies) to ensure our workflow is robust enough to work with multiple data sets and different types of anomalous events (e.g., cracks and piping). We apply Haar wavelet-denoising techniques and extract nine spectral features from decomposed segments of the time series data. The two-class SVM with 10-fold cross validation achieved over 94% overall accuracy and 96% F1-score. Our approach provides a means for automatically identifying anomalous events using various machine learning techniques. Detecting internal erosion events in aging EDLs, earlier than is currently possible, can allow more time to prevent or mitigate catastrophic failures. Results show that we can successfully…

Subjects/Keywords: Geophysics; Computer science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fisher, W. D. (2017). Machine learning for the automatic detection of anomalous events. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10258193

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):

Fisher, Wendy D. “Machine learning for the automatic detection of anomalous events.” 2017. Thesis, Colorado School of Mines. Accessed January 20, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10258193.

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

MLA Handbook (7^th Edition):

Fisher, Wendy D. “Machine learning for the automatic detection of anomalous events.” 2017. Web. 20 Jan 2019.

Vancouver:

Fisher WD. Machine learning for the automatic detection of anomalous events. [Internet] [Thesis]. Colorado School of Mines; 2017. [cited 2019 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10258193.

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

Council of Science Editors:

Fisher WD. Machine learning for the automatic detection of anomalous events. [Thesis]. Colorado School of Mines; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10258193

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

Colorado School of Mines

16. Swift Bird, Kenneth. Hydrogeological controls of uranium and arsenic mobility in groundwater of the Pine Ridge Reservation, South Dakota.

Degree: MS(M.S.), Geology and Geological Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172549

► This study integrates geochemical modeling, spatial analysis and several statistical methods including principal component analysis, multivariate regression and cluster analysis to investigate hydrogeologic controls of… (more)

Subjects/Keywords: Groundwater evolution; Pine Ridge Reservation; Arsenic; Uranium; Hydrogeochemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Swift Bird, K. (2018). Hydrogeological controls of uranium and arsenic mobility in groundwater of the Pine Ridge Reservation, South Dakota. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172549

Chicago Manual of Style (16^th Edition):

Swift Bird, Kenneth. “Hydrogeological controls of uranium and arsenic mobility in groundwater of the Pine Ridge Reservation, South Dakota.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172549.

MLA Handbook (7^th Edition):

Swift Bird, Kenneth. “Hydrogeological controls of uranium and arsenic mobility in groundwater of the Pine Ridge Reservation, South Dakota.” 2018. Web. 20 Jan 2019.

Vancouver:

Swift Bird K. Hydrogeological controls of uranium and arsenic mobility in groundwater of the Pine Ridge Reservation, South Dakota. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172549.

Council of Science Editors:

Swift Bird K. Hydrogeological controls of uranium and arsenic mobility in groundwater of the Pine Ridge Reservation, South Dakota. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172549

Colorado School of Mines

17. Singh, Jagmit. Nozzle design and experimental evaluation to mitigate liquid loading in gas wells.

Degree: MS(M.S.), Petroleum Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172562

► This study consists of an experimental investigation of nozzle geometry effect on critical/subcritical flow transitions with applications on liquid loading mitigation in gas wells. Experiments… (more)

▼ This study consists of an experimental investigation of nozzle geometry effect on critical/subcritical flow transitions with applications on liquid loading mitigation in gas wells. Experiments were conducted in a facility with 1.5 in. ID PVC pipelines and a 30 ft long vertical section, which mimics two-phase flow (air and water) in gas wells. In total, 27 different nozzle geometries were tested, which were divided into two groups – conical and parabolic nozzles. The nozzle geometries tested were 3D printed and had a throat size of 0.25 in. The experimental investigation was divided into three phases. The first phase consisted of a series of tests using 27 nozzle geometries in a single-phase (air) horizontal flow facility, with the purpose of determining the most optimum nozzle geometries groups based on measured key performance indicators. Phase two involved testing these top performing nozzle geometries in a two-phase horizontal flow loop. Phase three consisted of testing the same geometries as for phase two in a two-phase vertical flow loop, determining nozzle performance in vertical flow, comparing with horizontal flow observations and determining the most optimum nozzle geometry. A nozzle geometry was considered optimum if it exhibited the highest critical pressure ratio and at the same time minimized pressure drop across the nozzle. Experimental results from phase 1 showed that nozzle geometry does have a significant impact on nozzle performance. Nozzles from ASTAR, Deich, LJ and Moby Dick nozzle groups showed improved performance compared to other nozzle groups. An empirical model was created based on phase 1 data in order to determine the effect of surface area of convergent and divergent section of nozzle on nozzle performance. The map created can be used to predict critical pressure ratio of a nozzle geometry by matching the nozzle design to the ones that have been tested. It was also determined that a smaller diverging angle resulted in a higher critical pressure ratio. A nozzle with an elongated throat had a higher critical pressure ratio, but at the same time it had a higher pressure drop across the nozzle, hence was not optimum. Length of a nozzle did not have as much of an impact on nozzle performance as the throat diameter and shape of nozzle converging and diverging sections immediately before and after the throat. Phase 2 experimental results showed that critical pressure ratio decreases when two phases are flowed through the nozzle. The length of the annular churn flow pattern observed at the exit of the nozzle may have a correlation to the nozzle performance. Based on data analysis, ASTAR nozzle geometry was the most optimum nozzle. Phase 3 data was analyzed and the most optimum nozzle geometry was determined to be ASTAR nozzle 2. Comparison with phase 2 data indicated a further drop in critical pressure ratio and an increase in pressure drop due to the effect of gravitation of the fluid flow. Advisors/Committee Members: Zerpa, Luis E. (advisor), Ermila, Mansur A. (committee member), Partington, Ben (committee member), Gamboa, Jose (committee member).

Subjects/Keywords: Experimental; Nozzle; Artificial lift; Two-phase flow; Liquid loading

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Singh, J. (2018). Nozzle design and experimental evaluation to mitigate liquid loading in gas wells. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172562

Chicago Manual of Style (16^th Edition):

Singh, Jagmit. “Nozzle design and experimental evaluation to mitigate liquid loading in gas wells.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172562.

MLA Handbook (7^th Edition):

Singh, Jagmit. “Nozzle design and experimental evaluation to mitigate liquid loading in gas wells.” 2018. Web. 20 Jan 2019.

Vancouver:

Singh J. Nozzle design and experimental evaluation to mitigate liquid loading in gas wells. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172562.

Council of Science Editors:

Singh J. Nozzle design and experimental evaluation to mitigate liquid loading in gas wells. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172562

Colorado School of Mines

18. Ritter, Martin. Development of a radioactive holmium-166 skin patch to treat skin cancer.

Degree: MS(M.S.), Physics, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172536

► Skin cancer is the most common form of cancer affecting over 3 million people per year in the US alone. The two most common forms… (more)

Subjects/Keywords: Radiotherapy; Nuclear medicine

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APA (6^th Edition):

Ritter, M. (2018). Development of a radioactive holmium-166 skin patch to treat skin cancer. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172536

Chicago Manual of Style (16^th Edition):

Ritter, Martin. “Development of a radioactive holmium-166 skin patch to treat skin cancer.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172536.

MLA Handbook (7^th Edition):

Ritter, Martin. “Development of a radioactive holmium-166 skin patch to treat skin cancer.” 2018. Web. 20 Jan 2019.

Vancouver:

Ritter M. Development of a radioactive holmium-166 skin patch to treat skin cancer. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172536.

Council of Science Editors:

Ritter M. Development of a radioactive holmium-166 skin patch to treat skin cancer. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172536

Colorado School of Mines

19. Youngblood, Ronald C. Heat treating response of 0.6 C steels for saw chain applications.

Degree: MS(M.S.), Metallurgical and Materials Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172560

► Steels used in saw chain applications require a combination of strength, toughness, and wear resistance. The focus of this project is to develop improved steels… (more)

▼ Steels used in saw chain applications require a combination of strength, toughness, and wear resistance. The focus of this project is to develop improved steels for saw chain applications by utilizing alloying and processing techniques to improve upon the current generation of saw chain steels. This is accomplished by studying the relationship between heat treatment processing and the corresponding microstructures and properties of two medium carbon low alloy steels. The first alloy is designated OCS 01 and is similar to a lean alloyed 8660 steel. The second alloy is a high silicon 9260 alloy, chosen for its ability to produce austenite containing microstructures in the carbon and hardness range of interest for current saw chain steels. Austempering, quenching and tempering (Q&T), and quenching and partitioning (Q&P) (9260 only) processing methods were simulated. For Q&P processing, the volume fraction of retained austenite decreased with time at higher partitioning temperatures, due to decomposition of the austenite to ferrite and iron carbides. Higher austempering temperatures decreased the time to reach bainitic transformation stasis, and increased the volume fraction of retained austenite. The austenite carbon content increased with time for each Q&P partitioning temperature evaluated. Vickers hardness measurements showed a consistent decrease in hardness with increased time and temperature when partitioning or tempering, as well as a decrease in hardness with increased isothermal austempering temperature. Charpy impact testing showed that the Q&P processing conditions of the 9260 alloy offer a significant improvement in Charpy impact energy absorbed at room and low ( 29 °C ( 20 °F)) temperature when compared to the 9260 austempered and Q&T conditions at equivalent hardness. DSRW wear testing showed that the Q&P 9260 conditions have improved low-impact abrasive wear resistance at equivalent hardness when compared to all other conditions evaluated. 9260 Q&P conditions had greater combinations of wear performance and Charpy impact performance when compared to the austempered and Q&T 9260 conditions. Tensile testing results showed that select 9260 processing conditions offer improved tensile properties (yield strength, peak stress, uniform elongation, and/or total elongation) when compared to the OCS-01 processing conditions. Increased amounts of retained austenite were observed to increase the total elongation of 9260 Q&P conditions, and increase the product of tensile strength and total elongation. A 9260 Q&P condition was identified, which offers improved combinations of tensile strength, uniform elongation, total elongation, and wear performance when compared to the OCS-01 conditions evaluated. Advisors/Committee Members: Speer, J. G. (advisor), Findley, Kip Owen (committee member), De Moor, Emmanuel (committee member).

Subjects/Keywords: Austenite; Quenching and partitioning; Wear; Hardness; Austempering; Steel

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APA (6^th Edition):

Youngblood, R. C. (2018). Heat treating response of 0.6 C steels for saw chain applications. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172560

Chicago Manual of Style (16^th Edition):

Youngblood, Ronald C. “Heat treating response of 0.6 C steels for saw chain applications.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172560.

MLA Handbook (7^th Edition):

Youngblood, Ronald C. “Heat treating response of 0.6 C steels for saw chain applications.” 2018. Web. 20 Jan 2019.

Vancouver:

Youngblood RC. Heat treating response of 0.6 C steels for saw chain applications. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172560.

Council of Science Editors:

Youngblood RC. Heat treating response of 0.6 C steels for saw chain applications. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172560

Colorado School of Mines

20. Smith, Alyssa. Tracing the magmatic to hydrothermal evolution of the Mount Rosa Complex, Colorado : textural and chemical evidence using zircon.

Degree: MS(M.S.), Geology and Geological Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172542

► Located ~15 km west of the city of Colorado Springs, the ~1.04 Ga Mount Rosa Complex (MRC) consists of a diverse groups of peraluminous to… (more)

▼ Located ~15 km west of the city of Colorado Springs, the ~1.04 Ga Mount Rosa Complex (MRC) consists of a diverse groups of peraluminous to peralkaline granitic rocks hosted in the ~1.08 Ga Pikes Peak Batholith. From oldest to youngest, the MRC comprises the following rock units: the peraluminous Pikes Peak biotite granite (PPG), fayalite-bearing quartz syenite, granitic dikes, peralkaline Na-amphibole Mount Rosa granite (MRG), mafic dikes, and type-(I) and type-(II) NYF-type pegmatites. All rock units in the MRC are highly elevated in REEs and HFSEs compared to other A-type magmatic systems. In order to better understand the magmatic to hydrothermal evolution of the enigmatic MRC, zircons from each rock unit were analyzed using transmitted light microscopy, BSE imaging, EDS spot analyses, automated mineralogy bright phase searches, SEM-CL imaging, EMPA, and Raman spectroscopy to document their textural and chemical variations across all rock units. Based on petrography and automated mineralogy, zircons were divided into 5 categories: Type 1A: euhedral early magmatic zircon, type 1B: early magmatic sieved textured zircon, type 1C: early magmatic patchy zircon, type 2: pegmatitic wallrock zircon, and type 3: hydrothermal zircon. Type 1A zircon occurs in the PPG, fayalite-bearing quartz syenite, and type-(I) pegmatites. Type 1A zircons exhibit concentric zoning and oftentimes have metamict zones. Type 1B zircon is isolated to certain areas of the MRG and is characterized by an abundance of large inclusions. Type 1C zircon is found in the granitic dikes, areas of the MRG where type 1B zircon is not found, and mafic dikes. Type 1C zircons display patchy erratic zoning and host small but abundant REE-bearing mineral inclusions. Type 2 zircons are mostly found in type-(II) pegmatite rims, and are inferred to be magmatic zircons with a hydrothermal overprint, causing unusual zoning. Type 3 zircons are found in the core of some type-(II) pegmatites, and are characterized as hydrothermal zircons that make up a complex array of vein networks. Contrary to prior suggestions, chemical and textural zircon data from all rock units within the complex suggests the peralkaline MRG is co-magmatic with the peraluminous PPG. Chemically, all zircon types display enrichment in REE and HFSE relative to mantle-derived zircons, with increasing enrichment in the younger rock units (mafic dikes, type-(I) pegmatites, and type-(II) pegmatites). Additionally, the zircons of the peraluminous granitic dikes are strikingly similar to the zircons of the peralkaline Mount Rosa granite and mafic dikes, proposing a similar origin. Enrichment in REEs and HFSEs in the peraluminous PPG relative to other mantle derived magmas suggests its origin to be enriched mantle with potential crustal contamination during emplacement. As a result, the original peraluminous melt was rich in volatiles, alkalis, REEs and HFSEs. Fractional crystallization of the melt caused the parental peraluminous melt to become enriched in volatiles and incompatible elements,… Advisors/Committee Members: Pfaff, Katharina (advisor), Wendlandt, Richard F. (committee member), Gysi, Alexander (committee member).

Subjects/Keywords: Peraluminous; Peralkaline; Zircon

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APA (6^th Edition):

Smith, A. (2018). Tracing the magmatic to hydrothermal evolution of the Mount Rosa Complex, Colorado : textural and chemical evidence using zircon. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172542

Chicago Manual of Style (16^th Edition):

Smith, Alyssa. “Tracing the magmatic to hydrothermal evolution of the Mount Rosa Complex, Colorado : textural and chemical evidence using zircon.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172542.

MLA Handbook (7^th Edition):

Smith, Alyssa. “Tracing the magmatic to hydrothermal evolution of the Mount Rosa Complex, Colorado : textural and chemical evidence using zircon.” 2018. Web. 20 Jan 2019.

Vancouver:

Smith A. Tracing the magmatic to hydrothermal evolution of the Mount Rosa Complex, Colorado : textural and chemical evidence using zircon. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172542.

Council of Science Editors:

Smith A. Tracing the magmatic to hydrothermal evolution of the Mount Rosa Complex, Colorado : textural and chemical evidence using zircon. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172542

Colorado School of Mines

21. Henderson, Gerald. Distributed learning automata based data dissemination in swarm robotic systems.

Degree: MS(M.S.), Computer Science, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172521

► Swarm robotics systems often work in collaboration with humans to accomplish tasks in a random environment. Swarms allow many tasks to be accomplished within a… (more)

▼ Swarm robotics systems often work in collaboration with humans to accomplish tasks in a random environment. Swarms allow many tasks to be accomplished within a mission more quickly while generally being more cost effective. The robots in the swarm can also accomplish tasks that humans are not able to perform on their own. The random environments the swarms work in render any previous contact data between robots useless as the contact patterns are different for each deployment. In the case of military and disaster scenarios, delivering data items quickly is imperative to the success of a mission. However, robots have limited battery and need a lightweight protocol that maximizes data delivery ratio and minimizes data delivery latency while consuming minimal energy. Learning automata are a form of Reinforcement Learning that is computationally inexpensive and can adapt to a dynamic environment. This combination allows for lightweight decision making based on the current topology of the network. We present two learning automata based data dissemination protocols, LADD and sc-LADD. LADD uses learning automata with direct connections to all neighboring nodes to make efficient and accurate forwarding decisions while sc-LADD uses learning automata and exploits the swarming nature of the robotic systems to abstract swarms and reduce the number of decisions available to the learning automata, which also reduces overhead. Results from our extensive simulation in NS3 indicate that these two protocols complement each other to achieve these goals: LADD can be used to maximize data delivery ratio when residual energy is high, while sc-LADD can be used to significantly reduce overhead and maintains a reasonable delivery ratio when residual energy is low. Furthermore, simulation results are verified as they conform to our theoretical analysis of packet delay and learning automata convergence. Advisors/Committee Members: Han, Qi (advisor), Fisher, Wendy (committee member), Dantam, Neil (committee member).

Subjects/Keywords: Multicast; Data dissemination; Swarm robotics

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APA (6^th Edition):

Henderson, G. (2018). Distributed learning automata based data dissemination in swarm robotic systems. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172521

Chicago Manual of Style (16^th Edition):

Henderson, Gerald. “Distributed learning automata based data dissemination in swarm robotic systems.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172521.

MLA Handbook (7^th Edition):

Henderson, Gerald. “Distributed learning automata based data dissemination in swarm robotic systems.” 2018. Web. 20 Jan 2019.

Vancouver:

Henderson G. Distributed learning automata based data dissemination in swarm robotic systems. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172521.

Council of Science Editors:

Henderson G. Distributed learning automata based data dissemination in swarm robotic systems. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172521

Colorado School of Mines

22. Speake, Andrew J. Reduced-order energy modeling for advanced setpoint controls of residential buildings with time-of-use rates.

Degree: MS(M.S.), Mechanical Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172545

► In the United States, approximately 40% of energy is consumed by commercial and residential buildings, primarily attributed to a building's heating, ventilation, and air conditioning… (more)

Subjects/Keywords: Building energy model; Model predictive control; Variable electric rates; Building science; Applied optimization; Reduced order model

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APA (6^th Edition):

Speake, A. J. (2018). Reduced-order energy modeling for advanced setpoint controls of residential buildings with time-of-use rates. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172545

Chicago Manual of Style (16^th Edition):

Speake, Andrew J. “Reduced-order energy modeling for advanced setpoint controls of residential buildings with time-of-use rates.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172545.

MLA Handbook (7^th Edition):

Speake, Andrew J. “Reduced-order energy modeling for advanced setpoint controls of residential buildings with time-of-use rates.” 2018. Web. 20 Jan 2019.

Vancouver:

Speake AJ. Reduced-order energy modeling for advanced setpoint controls of residential buildings with time-of-use rates. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172545.

Council of Science Editors:

Speake AJ. Reduced-order energy modeling for advanced setpoint controls of residential buildings with time-of-use rates. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172545

Colorado School of Mines

23. Barcellos de Oliveira, Debora R. Design of materials for solar thermochemical hydrogen production.

Degree: PhD, Metallurgical and Materials Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172540

► Hydrogen is one of the most widely produced and used commodity “chemicals” in the world. Besides its current widespread use in the petrochemicals and ammonia… (more)

▼ Hydrogen is one of the most widely produced and used commodity “chemicals” in the world. Besides its current widespread use in the petrochemicals and ammonia production industries, it also has the potential to be used as an energy carrier for future power, transportation and storage applications. However, the environmental sustainability of hydrogen for such applications can only be assured if it can be obtained from renewable sources. Solar thermochemical hydrogen production (STCH) is a carbon-free technique that uses solar thermal heat to split water and produce hydrogen. The predicted high process efficiencies and scalability make this technique preferred for large scale hydrogen production over electrolysis or thermolysis. The current state-of-the-art material for STCH is ceria (CeO2), which produces hydrogen via a relatively straightforward two-step water splitting (WS) cycle. In the first step, carried out at a high temperature, the oxide reduces by creating oxygen vacancies and releases oxygen. In the second step, carried out at a lower temperature, the oxygen deficient oxide splits the water molecule and reoxidizes, thereby releasing hydrogen. The great challenge of using ceria is the high temperature required for the first reduction step, which is over 1600 °C. In this work I propose new materials for water splitting BaCe0.25Mn0.75O3 and three materials of composition CeaSr2-aMnO4 (a = 0.1, 0.2 and 0.3) that meet or exceed ceria’s water splitting performance, but at significantly lower temperatures (~1350-1400 °C). BaCe0.25Mn0.75O3 (BCM) is shown to produce about 3X more H2 than ceria at a lower reduction temperature (1350 °C) and is demonstrated to have a higher steam-to-hydrogen conversion than other promising perovskite candidates. This steam-to-hydrogen conversion concept was shown to be of extreme importance for the application of the STCH process in a realistic reactor. The thermodynamic properties of BCM were investigated to further understand the underlying reasons for its outstanding performance. This study led to the discovery of a beneficial polytype phase change that may take place during STCH cycling in this materials system and that likely contributes to its performance. Motivated by my discovery of the BCM system, we subsequently identified a Ruddlesden-Popper phase, CeaSr2-aMnO4 (CSM) which also showed excellent potential for STCH WS. Importantly, this phase had never before been reported in the literature. After a structure characterization study, this new materials system was demonstrated to produce 2-3X more hydrogen than ceria at the reduction temperature of 1400 °C. Both the BCM and CSM systems open up new directions for the deisgn and optimization of redox-active STCH materials that can provide higher performance at lower temperatures than CeO2, thereby underscoring remaining oportunities to further discover new materials for this important renewable energy application. Advisors/Committee Members: O'Hayre, Ryan P. (advisor), Tong, Jianhua (advisor), Sanders, Michael (committee member), McDaniel, Anthony H. (committee member), Pylypenko, Svitlana (committee member), Brennecka, Geoffrey (committee member).

Subjects/Keywords: Perovskites; Water splitting; Solar thermochemical; Hydrogen production

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APA (6^th Edition):

Barcellos de Oliveira, D. R. (2018). Design of materials for solar thermochemical hydrogen production. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172540

Chicago Manual of Style (16^th Edition):

Barcellos de Oliveira, Debora R. “Design of materials for solar thermochemical hydrogen production.” 2018. Doctoral Dissertation, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172540.

MLA Handbook (7^th Edition):

Barcellos de Oliveira, Debora R. “Design of materials for solar thermochemical hydrogen production.” 2018. Web. 20 Jan 2019.

Vancouver:

Barcellos de Oliveira DR. Design of materials for solar thermochemical hydrogen production. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172540.

Council of Science Editors:

Barcellos de Oliveira DR. Design of materials for solar thermochemical hydrogen production. [Doctoral Dissertation]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172540

Colorado School of Mines

24. Johnson, Andrew Charles. Constructing a Niobrara reservoir model using outcrop and downhole data.

Degree: MS(M.S.), Petroleum Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172518

► The objective of this study is threefold: 1) Build a dual-porosity, geological reservoir model of Niobrara formation in the Wishbone Section of the DJ Basin.… (more)

▼ The objective of this study is threefold: 1) Build a dual-porosity, geological reservoir model of Niobrara formation in the Wishbone Section of the DJ Basin. 2) Use the geologic static model to construct a compositional model to assess performance of Well 1N in the Wishbone Section. 3) Compare the modeling results of this study with the result from an eleven-well modeling study (Ning, 2017) of the same formation which included the same well. The geologic model is based on discrete fracture network (DFN) model (Grechishnikova 2017) from an outcrop study of Niobrara formation. This study is part of a broader program sponsored by Anadarko and conducted by the Reservoir Characterization Project (RCP) at Colorado School of Mines. The study area is the Wishbone Section (one square mile area), which has eleven horizontal producing wells with initial production dating back to September 2013. The project also includes a nine-component time-lapse seismic. The Wishbone section is a low-permeability faulted reservoir containing liquid-rich light hydrocarbons in the Niobrara chalk and Codell sandstone. The geologic framework was built by Grechishnikova (2017) using seismic, microseismic, petrophysical suite, core and outcrop. I used Grechishnikova’s geologic framework and available petrophysical and core data to construct a 3D reservoir model. The 3D geologic model was used in the hydraulic fracture modeling software, GOHFER, to create a hydraulic fracture interpretation for the reservoir simulator and compared to the interpretation built by Alfataierge (2017). The reservoir numerical simulator incorporated PVT from a well within the section to create the compositional dual-porosity model in CMG with seven lumped components instead of the thirty-two individual components. History matching was completed for the numerical simulation, and rate transient analysis between field and actual production are compared; the results were similar. The history matching parameters are further compared to the input parameters, and Ning’s (2017) history matching parameters. The study evaluated how fracture porosity and rock compaction impacts production. The fracture porosity is a major contributor to well production and the gas oil ratio. The fracture porosity is a major sink for gathering the matrix flow contribution. The compaction numerical simulations show oil production increases with compaction because of the increased compaction drive. As rock compaction increases, permeability and porosity decreases. How the numerical model software, CMG, builds the hydraulic fracture, artificially increases the original oil-in-place and decreases the recovery factor. Furthermore, grid structure impacts run-time and accuracy to the model. Finally, outcrop adds value to the subsurface model with careful qualitative sedimentology and structural extrapolations to the subsurface by providing understanding between the wellbore and seismic data scales. Advisors/Committee Members: Kazemi, Hossein (advisor), Ozkan, E. (committee member), Miskimins, Jennifer L. (committee member), Sonnenberg, Stephen A. (committee member).

Subjects/Keywords: Dual permeability; Modeling; Reservoir; Dual porosity; CMG; Niobrara

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APA (6^th Edition):

Johnson, A. C. (2018). Constructing a Niobrara reservoir model using outcrop and downhole data. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172518

Chicago Manual of Style (16^th Edition):

Johnson, Andrew Charles. “Constructing a Niobrara reservoir model using outcrop and downhole data.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172518.

MLA Handbook (7^th Edition):

Johnson, Andrew Charles. “Constructing a Niobrara reservoir model using outcrop and downhole data.” 2018. Web. 20 Jan 2019.

Vancouver:

Johnson AC. Constructing a Niobrara reservoir model using outcrop and downhole data. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172518.

Council of Science Editors:

Johnson AC. Constructing a Niobrara reservoir model using outcrop and downhole data. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172518

Colorado School of Mines

25. Manna, Sukriti. Design and discovery of new piezoelectric materials using density functional theory.

Degree: PhD, Mechanical Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172532

► Piezoelectric materials find applications in microelectromechanical systems (MEMS), such as surface acoustic wave (SAW) resonators, radio frequency (RF) filters, resonators, and energy harvesters. Using density… (more)

▼ Piezoelectric materials find applications in microelectromechanical systems (MEMS), such as surface acoustic wave (SAW) resonators, radio frequency (RF) filters, resonators, and energy harvesters. Using density functional theory calculations, the present study illustrates the influence of alloying and co-alloying with different nitrides on piezoelectric and mechanical properties of an existing piezoelectric material such as aluminum nitride (AlN). Besides improving the performance of existing piezoelectric material, a high-throughput screening method is used to discover new piezoelectric materials. AlN has several beneficial properties such as high temperature stability, low dielectric permittivity, high hardness, large stiffness constant, high sound velocity, and complementary metal-oxide-semiconductor (CMOS) compatibility. This makes it widely accepted material in RF and resonant devices. However, it remains a challenge to enhance the piezoelectric modulus of AlN. The first part of this thesis establishes that the piezoelectric modulus of AlN could be improved by alloying with rocksalt transition metal nitrides such as scandium nitride (ScN), yttrium nitride (YN), and chromium nitride (CrN). As the content of the rocksalt end member in the alloy increases, the accompanying structural frustration enables a greater piezoelectric response. This structural frustration is also accompanied by thermodynamic driving forces for phase separation which, with increased alloy concentration, lead to the destruction of the piezoelectric response upon transition to the (centrosymmetric, cubic) rocksalt structure. Thus, it becomes necessary to identify suitable alloying elements that may yield highest piezoelectric response with minimal alloying additions. The study reveals that the alloying with CrN would lead to the lowest transition composition (occurring at approximately 25% CrN concentration) between the wurtzite and rocksalt structures, thereby allowing piezoelectric enhancements at alloying levels that are easier to stabilize during the synthesis. The present study indicates that, for 25% CrN alloying, the piezoelectric modulus is about 4 times larger than that of pure AlN. Thus, it is proposed to use Cr_xAl_1-xN as a suitable replacement for AlN. One of the adverse effects of transition metal nitride alloying for improvement of the piezoelectric response is accompanied by the softening of AlN lattice. This would make the material less desirable for resonant applications. Our subsequent research establishes that co-alloying with YN and BN would enable the most superior combination of piezoelectric and mechanical properties of AlN. The rest of the thesis describes our efforts for identifying new piezoelectric materials. This requires high-throughput screening of inorganic materials for their piezoelectric properties. Our quest to search for new piezoelectric compounds is motivated by the notion that soft materials have the opportunity to exhibit large piezoelectric response (piezoelectric modulus bf{d}), and… Advisors/Committee Members: Ciobanu, Cristian V. (advisor), Stevanovic, Vladan (advisor), Brennecka, Geoffrey (committee member), Stebner, Aaron P. (committee member), Berger, John R. (committee member).

Subjects/Keywords: Piezoelectrics; AlN; Thin film

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APA (6^th Edition):

Manna, S. (2018). Design and discovery of new piezoelectric materials using density functional theory. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172532

Chicago Manual of Style (16^th Edition):

Manna, Sukriti. “Design and discovery of new piezoelectric materials using density functional theory.” 2018. Doctoral Dissertation, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172532.

MLA Handbook (7^th Edition):

Manna, Sukriti. “Design and discovery of new piezoelectric materials using density functional theory.” 2018. Web. 20 Jan 2019.

Vancouver:

Manna S. Design and discovery of new piezoelectric materials using density functional theory. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172532.

Council of Science Editors:

Manna S. Design and discovery of new piezoelectric materials using density functional theory. [Doctoral Dissertation]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172532

Colorado School of Mines

26. Levon, Taylor. Workflow development and sensitivity investigation of offset well-to-well interference through 3D fracture modeling and reservoir simulation in the Denver-Julesburg Basin.

Degree: MS(M.S.), Petroleum Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172525

► The objective of this research was to construct a calibrated multi-well 3D fracture model to evaluate well-to-well interference, also known as well “bashing”, in the… (more)

▼ The objective of this research was to construct a calibrated multi-well 3D fracture model to evaluate well-to-well interference, also known as well “bashing”, in the Niobrara and Codell formations of the Denver-Julesburg (DJ) Basin. Hydraulic fracturing is a vital component to produce in unconventional resource plays economically. In the early stages of development in all unconventional resource plays, including the DJ Basin, single well pads were common for either exploratory drilling or lease retention. Initially many shale plays across the world were not fully developed and in order to capture the resources originally left behind, infill drilling is taking place to access additional resources to create a greater effective stimulated rock volume (SRV) and achieve better recovery. Unfortunately, many previously drilled, producing “parent” wells and newly drilled “child” wells are actually yielding a reduction in recovery rates in short and long-term cases due to interference. Research has shown that one of the main contributors to the variability in production is the presence of pressure depletion from production around the parent wells and the impacts it has on subsequent child well completions. As a means of examining well-to-well interference, the focal point of this study was a nine well pad consisting of six wells in the Niobrara and three wells in the Codell. This pad showed evidence of interference measured using bottom hole gauges installed in the two “parent” wells, one in each formation, during the stimulation of the child wells. Oil and water flowback tracers utilized during the treatment of the child wells also supported the presence of communication. A multi-well, multi-stage (total of 500 stages) 3D hydraulic fracture model was developed using offset vertical well logs and geologic interpretation of mud logs to define the variation in rock properties that best represent the reservoir in which these wells were drilled. Calibration of the model consisted of using diagnostic measurements, diagnostic fracture injection tests (DFIT), step-down tests, and pressure matching measured to simulated treatment data. Using the calibrated model, the “parent” wells were simulated to generate individual stage fracture geometries. Results indicated uncontained hydraulic height growth throughout the Niobrara and from the Codell into the Niobrara. Using the results from the hydraulic fracture model, including conductivity and effective half-length, a pressure depletion profile due to production drawdown was created for the two parent wells. History matching the parent wells production (oil, gas, and water), using this numerical reservoir model, resulted in a subsequent pressure gradient radiating from the wellbore out into the reservoir. The history matched reservoir depletion model was then incorporated in the fracture modeling to simulate the treatments of “child” wells more accurately in a depleted reservoir. The parent wells’ hydraulic fracture and reservoir models culminated in the construction of a… Advisors/Committee Members: Miskimins, Jennifer L. (advisor), Barree, Robert D. (committee member), Dean, Elio (committee member).

Subjects/Keywords: Fracture modeling; Reservoir modeling; Well-to-well interference; Protection fracs; DJ Basin; Well bashing

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APA (6^th Edition):

Levon, T. (2018). Workflow development and sensitivity investigation of offset well-to-well interference through 3D fracture modeling and reservoir simulation in the Denver-Julesburg Basin. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172525

Chicago Manual of Style (16^th Edition):

Levon, Taylor. “Workflow development and sensitivity investigation of offset well-to-well interference through 3D fracture modeling and reservoir simulation in the Denver-Julesburg Basin.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172525.

MLA Handbook (7^th Edition):

Levon, Taylor. “Workflow development and sensitivity investigation of offset well-to-well interference through 3D fracture modeling and reservoir simulation in the Denver-Julesburg Basin.” 2018. Web. 20 Jan 2019.

Vancouver:

Levon T. Workflow development and sensitivity investigation of offset well-to-well interference through 3D fracture modeling and reservoir simulation in the Denver-Julesburg Basin. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172525.

Council of Science Editors:

Levon T. Workflow development and sensitivity investigation of offset well-to-well interference through 3D fracture modeling and reservoir simulation in the Denver-Julesburg Basin. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172525

Colorado School of Mines

27. Mitton, Melissa. Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity : field scale experimental and numerical study.

Degree: MS(M.S.), Civil and Environmental Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172530

► With the increased use of natural gas as a transition fuel on the path toward low-carbon energy, safety and environmental concerns from leaking underground natural… (more)

▼ With the increased use of natural gas as a transition fuel on the path toward low-carbon energy, safety and environmental concerns from leaking underground natural gas pipelines are becoming more widespread. Pipeline leakage can be catastrophic when flammable mixtures of methane and air accumulate and ignite. Methane is additionally a powerful greenhouse gas thus; leakage also poses adverse climate impacts. What is not well understood in leakage incidents is how the environmental conditions (i.e. soil type and moisture, competing utilities, ground surface cover) affect gas migration behavior (including the migration rate and extent). To mitigate these concerns, an increased understanding of gas migration through soil is necessary to support efficient leak response, improve leak detection technology, and inform policy and regulations. This study investigates the effects of various soil conditions including soil moisture, heterogeneity, gas leakage rate, and pipeline depth on natural gas migration caused by leaking pipelines. Eight field-scale experiments were performed in custom designed test beds with different soil textures, pipeline burial depths, and alterable leak rates and soil moistures. Subsurface and surface methane concentrations in addition to soil moisture, temperature, and meteorological data were collected over time under transient and steady state conditions. Results found pronounced effects of soil heterogeneities and to a lesser degree of soil moisture on the shape and travel distance of the subsurface methane plume. Leaks from shallow pipelines were found to produce higher surface methane concentrations than from pipelines buried deeper. Advection and buoyancy played a large role on methane concentrations close to the leak, whereas diffusion dominated as the plume moved farther away from the source. Although the conditions explained above were considered separately, they affect each other, yielding a combined and complicated effect on gas distribution profiles. Numerical modeling studies also ensued using TOUGH2 EOS7CA. Comparison to experimental results demonstrated the model’s ability to accurately simulate methane migration from a leaking pipeline. The findings of this study will aid leak detectors locate leaks more effectively and regulators create more knowledge based decisions to increase resident safety and decrease climate forcing emissions. Advisors/Committee Members: Smits, Kathleen M. (advisor), Hedayat, Ahmadreza (committee member), Barankin, Michael (committee member).

Subjects/Keywords: Experimental study; Natural gas; Diffusion; Pipeline leakage; Methane

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APA (6^th Edition):

Mitton, M. (2018). Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity : field scale experimental and numerical study. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172530

Chicago Manual of Style (16^th Edition):

Mitton, Melissa. “Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity : field scale experimental and numerical study.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172530.

MLA Handbook (7^th Edition):

Mitton, Melissa. “Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity : field scale experimental and numerical study.” 2018. Web. 20 Jan 2019.

Vancouver:

Mitton M. Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity : field scale experimental and numerical study. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172530.

Council of Science Editors:

Mitton M. Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity : field scale experimental and numerical study. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172530

Colorado School of Mines

28. Schrama, Claudia. Electric field sensing through second harmonic generation of ultrafast laser pulses.

Degree: MS(M.S.), Physics, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172544

► In dynamic processes such as spark discharges, it is impossible to insert field probes to measure rapidly varying and localized electric fields. In this thesis,… (more)

▼ In dynamic processes such as spark discharges, it is impossible to insert field probes to measure rapidly varying and localized electric fields. In this thesis, we investigate the use of second harmonic generation of an ultrafast laser pulse as a probe for an electric field. In an centrosymmetric medium, second harmonic generation is not allowed in the electric dipole approximation. However, breaking the symmetry of air with an applied electric field allows for the second harmonic generation to occur. The second harmonic signal holds information about the applied electric field and can be used to provide information on the vector structure of the electric field. Here we show that second harmonic generation can be used as a noninvasive field probe for the vector electric field applied over an air gap. We find that there is a significant background second harmonic signal without an applied field that results from a quadrupole nonlinear response of the air. When characterizing this background we find that the polarization purity is crucial to minimizing the quadrupole signal. Subtracting this background, taking two polarization directions, and scanning the beam spatially around a blade electrode, we show that we can make a field map of the electric field that is consistent with an electrostatic calculation. Analyzing the results from this work, we propose two methods for using this probe. The first is to use a pulse sequence and observe the second harmonics with a photomultiplier tube to see the voltage response over time. The pulse sequence will capture the electric field at each pulse and show the variations in the field over time. The second method is to use a beam that is simultaneously focused in space and in time. This will give a shorter depth of focus and should minimize the background second harmonic signal. The imaging is a possible probe for fields changing on the order of seconds. The efficiencies that need to be reached to image single shots are currently not available. Advisors/Committee Members: Durfee, Charles G. (advisor), Squier, Jeff A. (committee member), Flammer, P. David (committee member).

Subjects/Keywords: Electric field sension; Quadrupole expansion; Vector fields; Laser probe; Diagnostic tool; Second harmonics

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APA (6^th Edition):

Schrama, C. (2018). Electric field sensing through second harmonic generation of ultrafast laser pulses. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172544

Chicago Manual of Style (16^th Edition):

Schrama, Claudia. “Electric field sensing through second harmonic generation of ultrafast laser pulses.” 2018. Masters Thesis, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172544.

MLA Handbook (7^th Edition):

Schrama, Claudia. “Electric field sensing through second harmonic generation of ultrafast laser pulses.” 2018. Web. 20 Jan 2019.

Vancouver:

Schrama C. Electric field sensing through second harmonic generation of ultrafast laser pulses. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172544.

Council of Science Editors:

Schrama C. Electric field sensing through second harmonic generation of ultrafast laser pulses. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172544

Colorado School of Mines

29. Pereira, Paulo R. Reliability based models to evaluate the financial consequences of mining equipment component selection and purchasing decisions.

Degree: PhD, Mining Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172535

► The main deciding factor on the purchase of a component brand for mining equipment is usually the retail price or acquisition cost differential of that… (more)

▼ The main deciding factor on the purchase of a component brand for mining equipment is usually the retail price or acquisition cost differential of that component between different manufacturers. The components from different manufacturers will have different contributions to equipment downtime depending on their individual reliabilities, and therefore will directly influence revenue generation. The value of this downtime is often significantly higher than the differences in retail price or acquisition cost between the components. Compounding the situation is that mining companies do not have the models, tools and/or protocols to evaluate different component reliabilities and their immediate impact on the company’s cash flow. A comprehensive assessment of mining operations shows that there are no tools readily available to quantify that impact. As a result, this dissertation focuses on developing a methodology to establish these different reliabilities, how they affect equipment availability, and the immediate impact on a mining company’s cash flow. The methodology developed in this dissertation is evaluated by two approaches or (1) deterministic and (2) stochastic, based on Monte Carlo Simulation. To test the methodology, it is applied to two case studies involving hydraulic hoses from two different surface mines to quantify the relationship between component reliability, mining equipment availability and impact on the mining operation’s cash flow. The results from the models indicate that the lower reliability data set caused lower equipment availability and generated a larger net present value of the cash flows of the revenue loss than the data set with higher reliability. The results also indicate that the methodology can be successfully applied to any equipment component at any mine that uses a component reliability centered management program. The greatest contribution of this research is the methodology produced, which is a more viable alternative than conventional techniques to support operationally and financially effective equipment component purchasing decisions. Advisors/Committee Members: Miller, Hugh B. (advisor), Eggert, Roderick G. (committee member), Kim, Eunhye (committee member), Kaunda, Rennie (committee member).

Subjects/Keywords: Model; Mining management; Purchasing management; Equipment; Monte Carlo simulation; Financial; Reliability

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pereira, P. R. (2018). Reliability based models to evaluate the financial consequences of mining equipment component selection and purchasing decisions. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172535

Chicago Manual of Style (16^th Edition):

Pereira, Paulo R. “Reliability based models to evaluate the financial consequences of mining equipment component selection and purchasing decisions.” 2018. Doctoral Dissertation, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172535.

MLA Handbook (7^th Edition):

Pereira, Paulo R. “Reliability based models to evaluate the financial consequences of mining equipment component selection and purchasing decisions.” 2018. Web. 20 Jan 2019.

Vancouver:

Pereira PR. Reliability based models to evaluate the financial consequences of mining equipment component selection and purchasing decisions. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172535.

Council of Science Editors:

Pereira PR. Reliability based models to evaluate the financial consequences of mining equipment component selection and purchasing decisions. [Doctoral Dissertation]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172535

Colorado School of Mines

30. Lokanc, Martin. Political economy of non-renewable resource ownership and control, The.

Degree: PhD, Economics and Business, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172524

► A large body of literature finds a negative relationship between natural resource abundance and economic efficiency. With few notable exceptions, this literature does not account… (more)

▼ A large body of literature finds a negative relationship between natural resource abundance and economic efficiency. With few notable exceptions, this literature does not account for variations in the ownership and control of the resources. Through an analytical interpretation of results from a game-theoretic political economy model, this study examines how economic rents, the opportunity cost of firms, potential cost or market access advantages of the private sector and time preferences of politicians combine to affect a politician’s preferences for ownership and control of a non-renewable resource. I find that the resulting choice of ownership type, public or private, is context-specific and that no generalisations can be made: among other factors politicians will consider the size of the resource, expected price paths, whether the private sector has a cost or market access advantage over the state when making its decision, prices and the degree to which the government holds a non-controlling equity stake in the firm. With respect to the efficiency of public versus private ownership, I find that either model can be efficient and that the result is driven mainly by: (i) the differences in time preferences between politicians, the private sector and the social optimum; and (ii) the degree to which the private sector holds a non-appropriable competitive advantage over the government. The model provides a rich and nuanced interpretation of the incentives governments face in making ownership decisions over non-renewable resources. The results act as a reminder to advisers to take into consideration country specifics when making recommendations to governments about which forms of ownership and control lead to a more efficient outcome. Results are corroborated by observations in empirical literature and the model’s explanatory power is highlighted through a range of country case studies. Advisors/Committee Members: Davis, Graham A. (advisor), Heilbrunn, John R., 1954- (committee member), Eggert, Roderick G. (committee member), Miskimins, Jennifer L. (committee member).

Subjects/Keywords: Natural resources; Resource curse; Nationalization; State ownership; Political economy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lokanc, M. (2018). Political economy of non-renewable resource ownership and control, The. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172524

Chicago Manual of Style (16^th Edition):

Lokanc, Martin. “Political economy of non-renewable resource ownership and control, The.” 2018. Doctoral Dissertation, Colorado School of Mines. Accessed January 20, 2019. http://hdl.handle.net/11124/172524.

MLA Handbook (7^th Edition):

Lokanc, Martin. “Political economy of non-renewable resource ownership and control, The.” 2018. Web. 20 Jan 2019.

Vancouver:

Lokanc M. Political economy of non-renewable resource ownership and control, The. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2018. [cited 2019 Jan 20]. Available from: http://hdl.handle.net/11124/172524.

Council of Science Editors:

Lokanc M. Political economy of non-renewable resource ownership and control, The. [Doctoral Dissertation]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172524

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Open Access Theses and Dissertations