2020 - Mines Theses & Dissertations
Recent Submissions
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Understanding water fluxes through land, vegetation and air with coupled atmospheric and hydrologic modeling at extreme scales
The processes that govern the quality, quantity, and movement of water resources are a multifaceted and nonlinear system of interactions between the earth, the land surface, vegetation, and the lower atmosphere. Recent ... -
Security and privacy on smartphones : a sensing approach
The technological advancements have made smartphones an indispensable component of our daily lives. Security and privacy (S&P) on smartphones has thus become an important research topic. Since there are no universally ... -
Energy transition and decarbonization : essays at the intersection of policy and technology, The
The chapters in this dissertation comprise three separate works exploring the economics of mineral, energy, and environmental policy. In the first chapter, I use analytical and computational methods to examine the output ... -
Operation and control of multilevel current source converters for wind energy conversion system and STATCOM applications
Large Wind Turbines (WTs), exceeding 10 MW, are expected to become more available in the near future. Most large WTs utilize Permanent Magnet Synchronous Generators (PMSGs) to convert the mechanical power of the WT into ... -
Exothermic flux forge welding of steel tubulars
Welding processes inevitably alter the local microstructure and in turn affect the properties. For many grades of steels that require high strength, ductility, and toughness, it is difficult to maintain this combination ... -
Across- and along-strike structural and geochronological variations of the Nashoba-Putnam and Avalon terranes, eastern Massachusetts, Connecticut, and Rhode Island, southeastern New England Appalachians
A comprehensive structural and geochronologic investigation was combined with existing structural, geochronologic and geophysical data to characterize and interpret across- and along-strike variations associated with the ... -
Detection and potential impacts of nanomaterials released from building materials in the natural weathering environment
The use of (nano)-particles has increased over the past couple of decades, which includes incorporation into building materials such as lumber and cement. Since building materials are in the outdoor environment, incorporated ... -
Coupled mechanical and ultrasonic investigation of physical processes in granular gouge layers
Granular materials are abundant in nature, and depending on the external and inter-particle loading conditions, they exhibit complex features and states that are significantly different than the properties of the individual ... -
Assessment of alloy 709 accelerated creep properties for use in sodium cooled fast reactors
The high temperature mechanical properties and microstructural development of Alloy 709 were investigated from temperatures ranging from 550 to 650 °C. Constant load creep, stress dip, and stress relaxation tests were ... -
Isolated high efficiency multiplier cell-based PV system DC-DC converter for residential applications, An
The global increase in PV installations has driven researchers to find more efficient integration techniques for interfacing PVs with the grid. More innovative converter structures are required to overcome the challenges ... -
Environmental signal propagation, preservation, and identification in sediment routing systems
Landscapes and sedimentary records host important information about the evolutionary history of the Earth and other planetary bodies. The successful extraction of such information from the preserved record requires a ... -
Computationally efficient methods for block average models
In many applications, spatial data are typically collected at areal levels (i.e., block data), while inferences and predictions are desired about the variable at points or blocks different from those at which the variable ... -
Macroscopic quantum tunneling and quantum many-body dynamics in Bose-Einstein condensates
Quantum mechanics revolutionized the previous century, not only in technology with lasers and semiconductors but also our fundamental view of the world with Bell's inequality and entanglement. Quantum tunneling was the ... -
Flow through cylinder arrays subject to steady and unsteady pressure gradients
Though steady fluid flow through porous media is relatively well understood, fundamental questions remain for the case of unsteady fluid flow through porous media. Such flows occur in many environmental, industrial, and ... -
Chaos and complexity of magnetic spin-wave solitary wave dynamics in the complex cubic quintic Ginzburg-Landau equation
We report the development, implementation and complete experimental vindication of a model for complex dynamical behaviors in spin wave envelopes propagating in nonlinear, dissipative driven, damped systems. These backward ... -
Seismic and well log based machine learning facies classification in the Panoma-Hugoton field, Kansas and Raudhatain field, North Kuwait
This thesis focuses on applying machine learning on facies classification presented in three case studies: 1) supervised, 2) semi-supervised, and 3) unsupervised machine learning to classify facies in various well logs and ... -
Effect of fluid viscosity and density on proppant transport in complex slot systems, The
The main functions of hydraulic fracturing fluids are to create a fracture network and to carry and place the proppant into the created fractures networks, thus, keeping the fractures open and allowing hydrocarbons to flow ... -
GEANT4 simulations of beta-delayed particle emission of Beryllium 11 in a linear Paul trap
The phenomenon of nuclear halos occurs when the matter radius of near-dripline nuclei are extended due to very weakly bound neutrons (or protons). If the Q-value of the $\beta$ decay is greater than the separation energy ... -
Proterozoic geology of the northern half of the Mount Evans 7.5-minute quadrangle, The
The Picuris orogeny was a 1450 Ma to 1360 Ma convergent tectonic event that left a deeply rooted orogenic belt across central Arizona, northern New Mexico, and Colorado. Mechanisms for the Picuris orogeny are debated, in ... -
Effectiveness of acid mine drainage remediation on the water quality of the North Fork of Clear Creek, Gilpin County, Colorado
North Fork of Clear Creek (NFCC) was impacted by acid mine drainage (AMD) for over a century. Starting March 2017, a water treatment plant (NCCWTP) began treating AMD effluents entering NFCC, with the goal to decrease ...
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