Digital Commons Network^™

Upgrade Of Rare Earth Element Concentrate By Selective Dissolution And Ion Exchange, James Patrick Lepke

Theses and Dissertations

The rare earth elements (REEs) are irreplaceable in modern technology as theyplay a central role in catalysts, fiber optics, permanent magnets, and a myriad of other final products. These products go on to serve a variety of industries, including medical research and renewable energy. Crustal deposits of rare earths that are economically exploitable are very uncommon, with the largest known deposits occurring in China. During trade disputes, China has shown they are willing to exploit this natural monopoly over REEs, causing turmoil and large price fluctuations in the market for these critical minerals. This uncertainty led many countries to explore …

Airframe And Power Plant Certificate Continued Education Requirements And Renewals, Robert Teal

Theses and Dissertations

The aviation industry is growing and estimated to continue to grow over the next ten years, to a point where passenger travel will almost double. With industry growth new aircraft will be introduced employing rapidly advancing technology, and larger commercial fleets will demand a growth in the aircraft maintenance workforce. As the baby boomer generation approaches retirement there is a greater need for aviation maintenance technicians. An intern approach to fewer mechanics and major changes in technology is to implement requirements for continued education and certification renewals for Airframe and power plant mechanics. This policy would mirror that of other …

Recovering From The Loss Of A Loved One: A Group Protocol For Remaining Active In Valued Occupations While Coping With The Loss Of A Loved One, Hailey Axtell, Ty Berg

Occupational Therapy Capstones

Purpose: The purpose of this scholarly project is to develop a manualized intervention program utilizing the CMOP-E to better understand grief and coping while promoting occupational engagement for older adults who have recently lost a partner. A group protocol was created to address spirituality, the survivor, participation in desired occupations, and the environment to help with the process of grieving and promote occupational performance.

General Brochure, University Of North Dakota. Energy And Environmental Research Center

EERC Brochures and Fact Sheets

Highlights the Energy & Environmental Research Center’s employment, various resources for energy, fuel testing, technology development, and facilities. [This item is an outdated or superseded version and retained for historical purposes only. It may no longer reflect current information, policies, or practices.]

A Group-Protocol: Returning To Life Post Breast Cancer Treatment, Janice Finley, Ashley Timm

Occupational Therapy Capstones

The purpose of this project was to design a group protocol to assist breast cancer survivors living in the community to address unmet physical, cognitive, and psychosocial needs. There are more than 3.5 million breast cancer survivors within the United States today (American Cancer Society, n.d.). A cancer survivor's performance in meaningful occupations and roles need to be addressed as they learn to live with the long-term physical and psychosocial effects of treatments such as self-confidence and pain management (Burg et al., 2015; Kim, Kim, & Han, 2020). There is a lack of occupational therapy services for individuals diagnosed with …

Prevention Of Work-Related Musculoskeletal Disorders Among Individuals Utilizing A Home Computer Workstation, Dalton Fetsch, Jonah Kratochvil

Occupational Therapy Capstones

Purpose: The purpose of this project was to develop a comprehensive educational guide for office workers and students who utilize a home computer workstation for a majority of their day utilizing current evidence. This guide is intended to help prevent the onset of MSDs that often occur due to improper ergonomic positioning and limited resources when utilizing home computer workstations

Empowering Grand-Families Through Occupation: An Occupational Therapy Intervention Program For Grandchildren And Custodial Grandparents, Macie Romsdal, Gabrielle Wavra

Occupational Therapy Capstones

The purpose of this scholarly project was to create a program for occupational therapists to use with custodial grandparents and their grandchildren. The number of grandparents becoming primary caregivers to grandchildren continues to increase, and more than 5.7 million grandchildren in the United States were living with and being provided for by grandparents in 2014 (U.S. Census Bureau, 2014). Although there are benefits to being placed in grandparent care, there are also challenges. Some of the challenges custodial grandparents face are health concerns, financial resources, and changes in social supports and occupational roles (Marken & Howard, 2014). Grandchildren may have …

Activated Carbon In Mixed-Matrix Membranes, Jeremy Lewis, Maram A. Q Al-Sayaghi, Chris Buelke, Ali Alshami

Chemical Engineering Faculty Publications

Mixed matrix membranes (MMMs) have emerged as strong contenders to conventional membranes for gas and liquid separations. Although numerous studies on filler/matrix combinations have been conducted and thoroughly reviewed, a review of activated carbon (AC) as a filler has thus far been minimal. This review intends to fill this gap via critically analyzing the state-of-the-art on AC as a filler in MMMs. Aspects of AC-MMM research, with emphasis on AC fabrication from biomass pyrolysis, AC-MMM fabrication and resulting properties, and influence of AC on MMM performance are thoroughly elucidated. Furthermore, the various applications that have been investigated with AC-MMM membranes, …

Americans Support For Renewable Energy Is Disconnected From Their Understanding Of Powerline Infrastructure As A Mechanism To Mitigate Climate Change, Rebecca J. Romsdahl, Christopher J. Felege, Joshua E. Hunter, Cheryl Hunter, Susan N. Ellis-Felege

Earth System Science and Policy Faculty Publications

As nations are transitioning to renewable energy sources, they will need to expand and upgrade their energy infrastructure, including high-voltage power lines (HVPL). We have conducted the first nation-wide survey in the last thirty years to assess public attitudes toward HVPL in the USA. The study evaluates perceptions, knowledge, and attitudes toward building new transmission lines, as these relate to renewable energy, place attachment, and environmental impacts. Our results show that Americans do not recognize how new HVPL could help reduce greenhouse gas emissions; instead, respondents favor moving from centralized energy (large power stations and HVPL) to decentralized energy (local …

Flight Data Management And Pilot Protection In An Ads-B World, James Norman

Aviation Faculty Publications

Airlines and unions need to reconsider and reimagine what flight operational quality assurance (FOQA) data is, its use and protection. Open-source flight data, such as ADS-B, needs to be protected as strongly as traditional FOQA data for US operators. Airlines and unions should adopt contractual language that expands FOQA protections to all recording and transmitting devices, future proofing against emerging and novel technologies.

Assessing The Relationships Between Organizational Management Factors (4ps) And A Resilient Safety Culture In A Collegiate Aviation Program With A Safety Management Systems (Sms), Daniel Kwasi Adjekum

Aviation Faculty Publications

Resilient safety culture is a key factor in sustaining safety management systems (SMS) in a U.S. collegiate aviation program. The relationships between four organizational management factors (Principles, Policy, Procedures, Practices) and a resilient safety culture model based on Reason’s concept was assessed using an online survey instrument. Structural Equation Model (SEM) technique were used to assess measurement models of factors underlying a resilient safety culture. All four management factors had significant predictive relationship with resilient safety culture. Practices had the weakest predictive relationship with resilient safety culture and Policy had the highest. Procedures strongly mediated path between Policies and Practices …

A Review On The Influence Of Processing Methods On Corrosion Rates Of Mg-Cnt Nanocomposites, Jiselle Thornby, Ali Alshami, Meysem Haghshenas

Chemical Engineering Faculty Publications

Several studies have reported the corrosion rates of magnesium carbon nanotube nanocomposites, but their corrosion behavior is still not well understood. Adding carbon nanotubes (CNTs) to magnesium (Mg) matrices almost always results in an increase in mechanical properties, e.g., increased elastic modulus, hardness, ultimate tensile strength, and yield strength. However, this increase in mechanical properties usually comes at the expense of compromised corrosion resistance. Galvanic interactions between the carbon nanotubes and the magnesium matrix are the usual culprits of nanocomposite corrosion. It is important to study the corrosive behavior of these materials further to create a nanocomposite that is less …

Reliability Analysis Of Low-Frequency Ac Transmission System Topology Of Offshore Wind Power Plants, Ashoke Kumar Biswas

Theses and Dissertations

Many countries and regions of the world are planning to reduce the energy sector's carbon footprint and increase sustainable energy sources. To this end, wind power has become one of their primary renewable energy sources. However, wind power's significant challenges relate to the need for long transmission lines that connect the offshore wind power plants to the onshore grid. The three major transmission configurations and design topologies of High Voltage AC (HVAC) Transmission, High Voltage DC (HVDC) Transmission, and Low-Frequency AC (LFAC) Transmission for offshore wind power resources have been thoroughly discussed both in industry and academia. HVAC is the …

Hydraulic Fracture Propagation And Its Geometry Evolvement In Transversely Isotropic Formations, Dezhi Qiu

Theses and Dissertations

During the last two decades, the oil and gas industry started production from unconventional reservoirs, thanks to the rapid development of hydraulic fracturing technology. Fractures such as joints, faults, veins, and bedding planes are ubiquitous in unconventional formations such as laminated reservoirs. These discontinuities always form complex networks affecting the hydrological and mechanical behavior of subsurface rocks. Ideally, hydraulic fractures are expected to communicate these fracture networks to form a continuous path for fluid flow. However, the interaction mechanism between hydraulic fracture and natural fractures may result in different propagation paths to form various fracture geometries and stimulated reservoir volume …

Aerocom: Winter 2021, John D. Odegard School Of Aerospace Sciences

Aerocom: John D. Odegard School of Aerospace Sciences Alumni Magazine

No abstract provided.

Numerical Simulations Of Hydraulic Fracturing Through Perforated Wellbores, Omar Akash

Theses and Dissertations

Unconventional reservoirs such as tight formations and plays, are known by their ultra-low permeability. To economically produce hydrocarbon from these reservoirs, technology-based solutions need to be deployed. hydraulic fracturing is a widely accepted and applied technology for successful development of unconventional reservoirs.

The fractures initiated near wellbore can have different lengths, widths, and heights. As a result, a complex fracture network is expected to be formed near wellbore. The hydraulic fracturing design is related to several parameters. Some of these parameters cannot be altered such as the geological attributes and mechanical properties of the targeted formation and the field in-situ …

Role Of Gravin/Akap12 Variants In Regulating Endothelial Cell Behavior, Ashrifa Ali

Theses and Dissertations

A functional endothelium must maintain an equilibrium among processes such as endothelial cell (EC) migration, barrier function and angiogenesis. The endothelium is constantly exposed to external factors that that result in a complex network of signaling wired to several possible cellular outcomes. A-kinase anchoring proteins (AKAPs) have a critical role in regulating cell signaling by providing spatial and temporal control of signaling proteins to increase downstream target specificity. Several studies have linked gravin (also called SSeCKS or AKAP12), an AKAP, to migration, barrier function, and angiogenesis. However, the functional significance of each gravin variant in ECs has not been investigated …

Career Aspirations Of Collegiate Aviation Students, Shayne A. Daku

Theses and Dissertations

Three studies in this dissertation examined the career aspirations of collegiate aviation students: student motivation with respect to career aspirations, military aviation career aspirations, and student perceptions of career pathway programs. Findings from each of these studies are valuable to students pursuing careers in aviation and industry partners seeking to fill pilot positions. Each of these reports highlights the desire of current collegiate aviation students to have a career that supports their values of remaining close and connected to their family and friends. In the first research, aviation graduates report crew base and hourly pay as the most important factors …

Landslide Remediation Methodology For Low-Volume Roads In North-Central Pennsylvania, Will Ned Brandenberger

Theses and Dissertations

The study of landslides in north-central Pennsylvania is not well developed, and remediation methodology for landslide-prone and low-volume forest roads in the region can benefit from targeted and innovative engineering design strategies. Rockery walls may be an underutilized remediation methodology for low-volume forest roads in north-central Pennsylvania. Two landslide remediation projects in north-central Pennsylvania within the Lycoming and Sullivan counties can provide valuable insight into the existing methodology associated with low-volume forest road remediation in north-central Pennsylvania and outline a potentially under-utilized methodology that may improve engineering design, construction efficiency, and result quality. A review of the two landslide remediation …

Photometric And Astrometric Analysis Of Three Near-Earth Asteroids, Steven D. Newcomb

Theses and Dissertations

Asteroid astrometry can provide precise information on an object’s orbital position and motion, while lightcurve photometry can help determine its rotational spin rate, its shape, and the possible presence of a binary satellite object in orbit around it.

This thesis therefore reports the astrometric and photometric study of three near-Earth objects (NEOs): 68347 (2001 KB67), 494999 (2010 JU39), and 455432 (2003 RP8). Because NEOs represent a record of the early solar system, serve as possible sources for minable material, and sometimes present an impact hazard to the planet Earth, the study of these asteroids is important for understanding their orbital …

An Evaluation Of Ci Asteroid Regolith As A Plant Growth Medium For Space Crop Production, Steven Jon Russell

Theses and Dissertations

Asteroids are small, undifferentiated bodies that materialized during the formation epoch of the solar system. With a concerted effort to establish a long-term presence in space, crewed missions to asteroids should not be ignored. A critical aspect of human missions is self-sustainability, primarily growing crops via in-situ resource utilization. CI carbonaceous asteroids are a primitive type of asteroid that retain elements found during that early solar system formation. More importantly, the regolith on these asteroids contains soluble elemental nutrients, such as phosphorous and potassium, that crops can use for growth and development. This thesis focuses on the ability of CI …

Reducing Produced Water Disposal Via Effective Treatments Methods And Re-Use: Proposed Sustainable Application For Bakken, North Dakota, Olusegun Stanley Tomomewo

Theses and Dissertations

It is true that the advancements in both the hydraulic frack and directional drilling technologies led to less time and a bit easier ways to develop unconventional oil and gas assets worldwide. In the Bakken North Dakota, the result of these breakthroughs and advancements in technologies are that they drastically reduce the time it takes to drill and complete a well leading to more wells (347 in 2004 to 16,300 in 2020). In 2019, the United States became the largest global crude oil producer, and the unconventional Bakken Play in North Dakota is one of the major contributors to this …

Performance And Motivation Of Pre- And Early-Career Professional Pilots, Nicholas David Wilson

Theses and Dissertations

The path from student pilot to professional aviator is lengthy, expensive and full of obstacles (Philips, 2016, Wilson & Daku, 2016). An individual pilot’s motivations to persevere and ultimately succeed within this field are yet to be clearly defined. Two motivation theories, Social Cognitive Theory (SCT) (Bandura, 1986) and Self-Determination Theory (SDT) (Deci & Ryan, 1985) may inform our understanding the connection between motivation and performance. Through three studies of a program of research, the researcher investigated relationships between distinct types of motivation and performance within the applied discipline of Aviation and Airline Pilot career performance. To begin the research, …

Monolayer Sorption Isotherm Model For Surface Tension Of Aqueous Surfactant Solutions Containing Electrolytes And Organic Mixtures, Kaiser Ahmed Bhuiyan

Theses and Dissertations

The surface tensions and compositions of aqueous aerosols dictate surface-mediated processes, especially the growth of aerosol particles into cloud nuclei and interfacial chemical reactions. Surface tension is also an indirect proxy for the partitioning of organics to the surface due to enhanced organic activity, driven by a reduction in solubility. Model predictions are generally not available for most surfactant-laden multi-component aqueous solutions, despite the importance of surface tension. Our recent multi-component surface tension model uses competitive adsorption at the interface, but these results are not consistent with salting out.1 We have now applied these techniques to surfactants in pure water …

North Dakota's New Frontier: Unmanned Aircraft, Matthew D. Dunlevy

Theses and Dissertations

Unmanned Aircraft, or drones, represent a modern-day frontier, one that is, as yet, neither fully explored nor fully developed. The state of North Dakota has moved into the frontier and is deeply involved in its exploration and development. The state has invested tens of millions of dollars in the Unmanned Aircraft Systems (UAS) industry, an investment that has helped to attract tens of millions of additional dollars from military sources and from private business firms. The University of North Dakota’s John D. Odegard School of Aerospace Sciences, long-recognized as among the leading aviation schools in the nation, is at the …

Development Of Metal-Containing Nanoparticles For Chemical Analysis And Bioanalysis, Juan Han

Theses and Dissertations

Metal-containing nanoparticles (MCPs) have been applied in fields ranging from environmental monitoring to biomedicine. This breadth is due to the outstanding behavior of MCPs as catalysts and imaging agents, and the ease with which nanoparticle morphology, composition, and reactivity (such as agglomeration) can be controlled. The work described in this dissertation will have two fundamentally different foci that are both essential for further development of MCPs as tools for chemical and bioanalysis. The first focus is on particle-by-particle characterization MCPs and the second focus is on creation of new composite MCPs. A total of four projects are included in this …

Ammonia/Water Thermodynamic Cycle For Lunar Power Applications, Jeremy David Harris

Theses and Dissertations

For long-term presence on the lunar surface, a reliable and efficient power source is required. A novel thermodynamic bottoming cycle which utilizes ammonia and water—the Kalina Cycle—is evaluated for use on the lunar surface. Terrestrial utilization of the Kalina Cycle shows higher efficiencies at lower temperatures and more compact packaging when compared to some other solar-powered systems. The research question is, "Can an ammonia-water thermodynamic cycle have benefits over other proposed power generation schemes on the lunar surface?" To analyze this question, an analysis of alternatives is performed which evaluates the Kalina Cycle against previously analyzed lunar power systems. Eight …

Numerical Investigation Of Aerodynamic Effects On Ash Impaction And Outside Ash Deposition Rates During Second Generation Atmospheric Pressure Oxy-Coal Combustion, Monika Kuznia

Theses and Dissertations

Oxy-combustion is one of the most competitive technologies for retrofitting existing pulverized coal-fired power plants to facilitate carbon capture and sequestration processes to reduce fossil fuel-derived carbon dioxide emissions into the atmosphere. However, one of the obstacles hindering the widespread commercialization of this technology is the need to recirculate large volumes of flue gas to the boiler. Second generation atmospheric pressure oxy-combustion technologies have been developed to reduce the volume of recirculated flue gas by using high oxygen concentrations in the inlet oxidizer streams. However, recent experiments have shown that an increased ash deposition propensity is associated with these oxygen-enriched …

Concentration-Streamflow Relationship In The Red River To North Near Grand Forks, North Dakota, Kabamba Nancy Ngoyi

Theses and Dissertations

For the last 15 years, the nutrient concentrations have fluctuated in both particulate and dis-solved forms. The increasing concentration of sulfate and chloride in the North Great Plain Basin impose threats to water quality in the Basin. During this spring snowmelt season of 2021, water samples were collected three times daily in the Red River at Grand Forks, North Dakota to de-velop a concentration streamflow relationship for sulfate, nitrate, chloride, and fluoride. The 2020-2021 winter was very dry as a result the snowmelt streamflow was very low, the rising limb period was short, but the streamflow increased rapidly from 75 …

Investigation Of Factors That Affect Site Selection For Geothermal Energy Extraction In North Dakota, Ogonna Obinwa

Theses and Dissertations

Geothermal energy is independent renewable energy extracted from deep and shallow subsurface to provide electricity and heat for many applications. At shallow depths of about 3000 feet (914 meters), temperatures as high as 70 degrees Celcius could be extracted and used for domestic and commercial heating systems. Deeper and hotter resources are usually available at depths greater than 10000 feet (3048 meters). The hotter the extracted fluid temperature, the better it is suited for electricity generation. New technologies such as binary cycle systems have made it possible to use moderately hot liquids for electricity generation. However, specific conditions must be …