Digital Commons Network^™

Review And Data Analysis Of Low Salinity Water Effect Through Induced Fine Migration, Dawei Xu

Masters Theses

"Low salinity water flooding (LSWF) is well proved to be an effective EOR technology both in laboratory and field tests, however, the conditions for LSWF to work and EOR mechanism is still debatable. Up till now, many mechanisms have been proposed to explain the incremental oil recovery in sandstone by LSWF, for instance, fine migration, ionic exchange, wettability alteration and pH increase.

In this study, we only focus on low salinity water flooding effect through induced fine migration mechanism. The objective of this study is to conduct a comprehensive analysis using statistical analysis methods and explaining the mechanism of fine …

Multiphysics Prediction Model Of Microwave Curing For Thick Polymer Composites, Siva Dasari

Masters Theses

"Microwave curing technologies have many advantages over the traditional thermal curing methods for the manufacturing of fiber reinforced polymers, especially the processing speed and energy efficiency. Energy can be instantaneously transferred through applied electromagnetic fields and heat is generated based on dipolar rotational interactions. Microwave curing processes have been used for glass fiber composites but there are significant challenges associated with microwave curing of carbon fiber composites. Efficient heating may be difficult due to high dielectric loss associated with carbon fibers. Laminate quality will be highly dependent on the uniformity of the electromagnetic field in the material. In this work, …

Performance Evaluation Of Bmi Resin System For Thin-Ply Composites, Manoj Kumar Reddy Rangapuram

Masters Theses

"Composites materials are increasingly being used in aerospace applications over the past few years. The unique properties like high strength to weight ratio, thermal stability, fatigue and corrosion resistance set them apart from the conventional materials. Composite materials are well suited for the applications where weight is the primary concern in the design. Composites structures are vulnerable to mechanical as well as thermal loadings. Transverse micro-cracking and delamination are the most common type of failures in composite materials. The thickness of the ply being used play a key role dictating the properties of the resultant composite structure. As the ply …

Abrasion Resistant Concrete Mix Design For Cold Climates, Diane Mariah Murph

Masters Theses

“Studded tire usage in Alaska contributes to rutting damage on pavements resulting in high maintenance costs and safety issues. In this study, binary, ternary, and quaternary highly-abrasion resistant concrete mix designs using supplementary cementitious materials (SCMs) were developed. The properties of fresh concrete and mechanical, and durability properties of hardened concrete for these mix designs were then tested to determine an optimum highly-abrasion resistant concrete mixture which could be placed in cold climates to reduce rutting damage. SCMs used included silica fume, ground granulated blast furnace slag, and type F fly ash. Tests including workability, air content, drying shrinkage, compressive …

Methane Dry Reforming Reaction On Cr, V, In, And Ga Supported Sapo-34 Zeolite, Ehigiator Festus Ojo

Masters Theses

”The CO₂ reforming of methane is a significant research area in mitigating and transforming two greenhouse gases for the production of syngas. The reaction has been investigated for four different promoted catalysts to determine their reactant's conversion, product’s selectivity, and their respective syngas ratios.

The catalytic test was investigated under atmospheric conditions at 600⁰C for 6.5h with a WHSV of 4800 ml g^-1 h^-1. The conversion and selectivity of catalysts 9Al 1V-inc SAPO-34, 9Al 1Cr-inc SAPO-34, 9Al 1Ga-inc SAPO-34, and 9Al 1In-inc SAPO-34 were analyzed. The CH₄ conversion for the different catalysts are, 9Al 1Cr-inc …

Unmanned Aerial And Traversing Vehicle -- A Mobile Platform For Bridge Inspections, Clayton A. Fritsche

Masters Theses

“Unmanned aerial vehicles (UAVs), also known as drones, have been rapidly growing in popularity since their creation. This study aimed to create a robotic platform used to assist in the inspection process of the nation’s aging and deteriorating bridges. To this end, a multimodal inspection robot that utilized both flying and driving technologies, was designed, analyzed, and tested for aerial, traversing, and their transitional operability. The design, herein referred to as the “BridgeBot”, was evaluated both computationally and experimentally. A finite element model of the BridgeBot was established and analyzed under static loading scenarios to help determine stress distributions and …

Performance Of One-Part And Two-Part Class C Fly Ash-Based Alkali Activated Mortars, Cedric Chani Kashosi

Masters Theses

“Seeking an eco-friendly concrete, researchers have conducted studies to fully replace ordinary Portland cement (OPC) with fly ash (FA) producing alkali-activated concrete (AAC). Results showed better performance of AAC in terms of high early compressive strength, and durability compared to conventional concrete. However, much is still unknown about the behavior of AAC. From the type of materials used, the curing procedure, and long-term strength development of these binders; a thorough investigation is needed in order to fill the existing gap from previous studies and thus make a step forward to the safely use of AAC in the construction industry. The …

Estimating Electromagnetic Emissions From A Site Installation With Multiple Racks Of Server Equipment, Ze Sun

Masters Theses

“There are hundreds, sometimes even thousands, of servers working simultaneously inside a data center. Their radiation can be a problem and cause EMI issues. However, it is not feasible to perform full-wave simulation of these racks because of the large electric size of the model. In this thesis, an algorithm is proposed to predict the emission form rack array. The equivalent dipole source is extracted from EMI measurement data of a single rack and used as the radiation source in the multiple rack model. The coupling between racks cannot be ignored, but through the simulation, it is also found that …

Feasibility Study For Sustainable Controlled Low-Strength Material (Clsm) Incorporating Off-Specification Fly Ash And Bottom Ash, Alexis K. Vandomelen

Masters Theses

“Controlled low-strength material (CLSM) is a self-consolidating cementitious material used in applications requiring high flowability and low strength. The primary components of this material, being cement and sand, however, negatively impact the environment. Cement is a large contributor to CO2 emissions, and the vast depletion of sand causes physical and political issues. Furthermore, over 100 million short tons of coal combustion products (CCP), including fly ash and bottom ash, are created annually in the United States, while nearly half of all CCP remain unused. No off-specification fly ash has been implemented in CLSM. This study uses coal ashes sourced from …

Influence Of Pumping Parameters On The Freeze-Thaw And Scaling Resistance Of Highly Workable Concrete, Alexandra Nicole Wehar

Masters Theses

“Over the past 60 years, pumping concrete has gained popularity due to the economic and technical benefits that typically accompanies it. However, boom configuration and flow rate can adversely affect freeze-thaw and scaling resistance of concrete due to the effects of pressure on the air-void system. Therefore, the objective of this research is to assess the influence of different pumping parameters on the durability of hardened self-consolidating concrete. Self-consolidating, flowable, and conventional concrete mixtures were tested during large scale pumping experiments positioning the pump boom in an “A” and a flat shape as well as using different pumping speeds. In …

Laser Machining Countersinks In Carbon Fiber Reinforced Polymer, Leon James Neely Hill

Masters Theses

“Laser machining countersinks with a frequency doubled Q-switched diode pumped Nd:YAG laser is demonstrated. Tests were conducted in 0.100" thick IM7 prepreg CFRP with [0,90]3S orientation. The HAZ is minimized to avoid stress concentrations in the epoxy matrix. A chamber and filtration system was designed and built to contain the byproducts produced in the machining process. The variables investigated are the number of repetitions in the offset path, the plunge rate, and the line energy. The research was performed over one baseline study, one parameter space exercise, two full factorial experiments, and one repeatability study. Assessment was done under an …

Controlled Switching In Kalman Filtering And Iterative Learning Controls, He Li

Masters Theses

“Switching is not an uncommon phenomenon in practical systems and processes, for examples, power switches opening and closing, transmissions lifting from low gear to high gear, and air planes crossing different layers in air. Switching can be a disaster to a system since frequent switching between two asymptotically stable subsystems may result in unstable dynamics. On the contrary, switching can be a benefit to a system since controlled switching is sometimes imposed by the designers to achieve desired performance. This encourages the study of system dynamics and performance when undesired switching occurs or controlled switching is imposed. In this research, …

Inclusion Engineering In Femnal Steels, Rairu Vaz Penna

Masters Theses

"Low density high Mn and Al steels, or FeMnAl steels, show great promise for military vehicles and automotive applications in which high strength and toughness is a requirement. However, these steels are subject to processing challenges including development of oxide and nitride inclusions during melting and casting as well as a large as-cast grain size and heavy interdendritic segregation. This can lead to non-uniform heat treatment response and cracking during subsequent hot rolling. Adding up to 10%Al lowers the density of these steels by as much as 15%, unfortunately, this also results in large amounts of hard and faceted AlN …

Exploration For Alteration Halos Around The Ag-W Deposits In Southeastern Missouri, Usa, Daniel Joseph Warbritton

Masters Theses

"The St. Francois Mountains in SE Missouri are an extensive terrane of granitic ring complexes and associated rhyolites. They were an important source of Ag, W, and Sn and mined intermittently from the 1800s until the 1950s. The Ag-W ores occur in the Silvermine Granite and rhyolite roof rocks. The deposits are classified as a xenothermal ore system with mineralization occurring in quartz veins and surrounding greisen (up to 2.5 m). Exploration for hydrothermal ore deposits often focuses on the identification of alteration halos in the surrounding host rocks. In the vast majority of xenothermal ore deposits, such as in …

Evaluation Of Naturally Occurring And Anthropogenic Contamination In Missouri Streams, Christina Jane Sehrt

Masters Theses

"The goal of this study is to observe the values and variability of water quality parameters and benthic macroinvertebrates in watersheds with very little anthropogenic impact and to compare these values with those acquired in watersheds with more anthropogenic impact. The following five HUC 12-digit watersheds had very little anthropogenic impact and were considered "pristine": Rogers Creek, Mill Creek, Middle West Fork-Black River, Bee Fork, and Ottery Creek. Five largely urban sub-basins were also considered; these basins are: Grand Glaize Creek, Glaize Creek, Sugar Creek, Hominy Creek, and Grindstone Creek. For each watershed, both water quality parameters and benthic macroinvertebrates …

Modeling Overpressure Development During Shale Rock Compaction Coupling Poroelasticity And Permeability Evolution Above 3km Depth, Wenyu Zhao

Masters Theses

"The evolution of pore pressure including overpressure during sedimentation is an important process to consider when analyzing whether high pore pressure causes rock failure. High pore pressure is caused by under-compaction due to the rapid burial of low-permeability sediments, and as a result, porosity decreases less rapidly with depth than in normally compacted sediments where porosity decreases exponentially with depth. While under-compaction related pore pressure magnitudes have been determined empirically, in most numerical modeling approaches, the pore pressure is either applied as a static magnitude or coupled to a fluid flow simulator. This study simulates the pore pressure evolution during …

Reprocessing And Comparison Of The 2 Hz And 10 Hz Vertical Component Seismic Data Of The Blackfoot 3c-2d Survey, Mete Sarikaya

Masters Theses

"The Blackfoot seismic 3C-2D data were obtained from the Consortium for Research in Elastic Wave Exploration Seismology (CREWES) Project in 1995. The seismic data acquisition was performed in the Blackfoot Field, which is around 15 km southeast of Strathmore, Alberta. The 4 Hz and 10 Hz vertical component data are reprocessed to increase the quality and resolution of the seismic images. The Glauconitic sand reservoir at approximately 1.1 s, and a strong reflection about at 1.5 s are the focuses of the study.

The processing procedure includes different parameters and methods to obtain the best seismic sections of 2 Hz …

Aerosol-Jet Printing And Flash Sintering Of Conformal Conductors On Non-Planar Surfaces, I-Meng Chen

Masters Theses

”The printed electronics have been broadly applied in our daily lives, many new manufacturing methodologies are studied and investigated. The research here presented the full manufacturing process of printed conductors of aerosol printing and flash sintering techniques on substrates such as planar and non-planar surfaces.

The aerosol printing (AJP) was introduced because of its simplicity in experimental setup and flexibility of printing. It produces less ink waste and consumes less manufacturing cost. Furthermore, it has the direct-write ability to print in any customized patterns or shapes on non-planar surfaces. In this study, the Cu NPs was selected as the functioning …

Development Of Castrip Dual Phase Steel, Brenton Allen Hrebec

Masters Theses

“Thermomechanical processing necessary to produce DP 980 steel using CASTRIP hot band was investigated. The resultant steel has an ultimate tensile strength of 1038 MPa, yield strength of 744 MPa, and total elongation of 8.6%. These mechanical properties were achieved by batch annealing the hot band at 649°C for 48 hours and cold rolling to a 20% reduction. The steel was continuously annealed to simulate a galvanization cycle with an intercritical temperature of 810°C. The possibility of improving the texture of the steel by warm rolling under dynamic strain aging conditions was investigated. Dynamic strain aging in the CASTRIP hot …

Associational Republicanism: Antifederalism In Context, 1790 - 1830, Ashley Jordan

Masters Theses

No abstract provided.

Liquid-To-Liquid Low Grade Waste Heat Recovery Using A Two-Channel Loop, Waleed Farwana

Masters Theses

The use of thermoelectric generators (TEGs) for producing electric energy from low grade “waste heat” has been theorized to provide a sustainable and low-cost energy source for electric power plants. The purpose of this study is to model and experimentally validate a TEG device that takes advantage of low grade waste heat (approximately 100-150 degrees Celsius) in liquid form in order to generate power that can be used for various applications in the surrounding environment. This research aims to demonstrate that optimized TEG designs bear the potential to compete with other methods of low grade waste heat energy harvesting in …

Limited By Design: Expanding The Boundaries Of Schooling Policies From Demanded Passivity To Transformative Practice, Natalia T. Carvalho-Pinto

Masters Theses

Schooling is often imagined as the great equalizer and the primary venue towards personal and collective liberation. However, hegemonic ideals and practices have limited the ability for educators to craft and utilize policy in a way that best benefits their students. In this thesis, I utilize the state of Michigan’s Common Core curriculum to examine the limits beyond policy and practice. Specifically, I argue that the demands for student passivity and institutional measurable as signs of success, prohibit student growth. Throughout the document, I describe hope in the ability to instill a variety of transformative educational theories and practices that …

The Role Of Music In Worship Among Deaf Culture Christianity, Mallory Ruth Dunn

Masters Theses

Throughout the Word of God, we are called to worship our Creator through music. "Shout for joy to the Lord, all the earth, burst into jubilant song with music; make music to the Lord with the harp and the sound of singing, with trumpets and the blast of the ram's horn--shout for joy before the Lord, the King" (Psalm 98: 4-6 [NIV]). It has been said that music is a universal language: but all cultures use it differently and therefore it is not a universal language but a universal phenomenon. What about the individual who cannot hear the music or …

Finding Identity Through Irish Music In The Appalachian Mountains, Marina Delores Rayl

Masters Theses

The Appalachian Mountains are filled with remnants of Scot-Irish heritage. The music found in this region includes bluegrass, Old-time, and country music, all created from the blending of Scottish and Irish traditional music with other ethnic sounds. Despite these music variations, traditional Irish music has remained consistent in its original form in the mountain region. This concept is supported by the popularity of two key events occurring in both the northern and southern sections of the Appalachians. Through fieldwork and personal interviews, the rationales of those who participated were discovered. The research brought to light three people sub-groups revealing the …

Technology And The Printed Book: Pursuing A Holistic Human Experience With A Sacred Text, Rachel Dugan

Masters Theses

There exists a sort of gravitas attached to a book that is printed and bound by hand that gets lost on the production line. When holding a hand-printed (or hand-written), hand-bound codex next to a mass-produced book, there is between the two a visible and tactile difference in quality and harmony between form and content. With the modern technological advancements now available, how can the craftsmanship and beauty — the gravitas — evident in books of the past be replicated in a way that is aesthetically pleasing, harmonious in message, and reflective of the present time? As objects, books are …

The Origins And Uses Of The Three-Fifths Clause Related To Slavery And Taxation, William F. Hughes

Masters Theses

The Three-fifths clause of the 1787 U.S. Constitution is noted for having a role in perpetuating racial injustices of America’s early slave culture, solidifying the document as pro-slavery in design and practice. This thesis, however, examines the ubiquitous application of the three-fifths ratio as used in ancient societies, medieval governments, and colonial America. Being associated with proportions of scale, this understanding of the three-fifths formula is essential in supporting the intent of the Constitutional framers to create a proportional based system of government that encompassed citizenship, representation, and taxation as related to production theory. The empirical methodology used in this …

C.S. Lewis And The True Myth: A Reconciliation Of Theology, Philosophy, And Mythology, Courage Lowrance

Masters Theses

C.S. Lewis was both a student of pagan philosophy and mythology and a Christian. He never was divided between these two pursuits in his life, though he gave the latter its proper priority. What allowed Lewis to keep this balance was his idea of the gospel as the True Myth, an idea that helped lead to his conversion and remained at the core of his thinking throughout his life. By this idea of True Myth, Lewis was able to not only unite the pagan myths to Christian truth, but also the rest of human thought as well. Thus, in order …

The New England Narrative, Cynnamon C. Mathis

Masters Theses

Though equally successful, noteworthy, inspiring, and crucial as the contributions to American Independence made by New England women patriots, the contributions made by North Carolinian women patriots are excluded from the history of America’s founding as a direct result of sectional nationalism.

Soteriology In Mainstream Monotheistic Religions: The Messiah Conundrum, Jay Fox

Masters Theses

For the promotion of the Gospel, this study seeks to examine Soteriology in Mainstream Monotheistic Religions: The Messiah Conundrum. This decidedly charged topic critically researches the philosophy of salvation doctrine, or soteriology, within major monotheistic religions. The highlighted problem is the Messiah conundrum, with critical research on each doctrine for epistemological significance of a savior and their beliefs surrounding salvation. This mystery of where, or who humans turn to for salvation, is vitally important when considering the principle of sufficient reason in today’s hermeneutic and apologetic circles. The purpose fueling this thesis is the resolute documenting of beliefs of major …

Examining Keswick For Benefits To Chaplain Resilience Ministry, Caleb Walker

Masters Theses

The Keswick Convention movement, which began in Keswick, England in 1870 and emphasized deeper knowledge and experience of God, has often been criticized and marginalized in evangelical theological circles. The structure of the conferences, with an emphasis upon six major theological themes and their application for daily Christian living, seems to have value for many attendees in deepening their Christian life. This study examines the potential benefits of the Keswick themes with particular application to the military chaplaincy setting and the issue of spiritual resilience. By examining criteria for resilience (steadfastness, perseverance, courage, and recuperation) and utilizing a qualitative research …