Digital Commons Network^™

Theoretical Studies Of Oxides Relevant To The Combustion Of Fossil Fuels, Jason Hicks

Theses and Dissertations

Anthropogenic pollution has greatly increased since the industrial revolution and continues to increase as more of the world becomes dependent upon fossil fuels for important applications like transportation and power production. In a general case, whenever a fossil fuel is consumed, a primary product of a complete combustion reaction is carbon dioxide. In a more specific case, the collection, processing and combustion of coal for power production are one of the primary ways by which trace elements, such as arsenic and selenium, are released into the environment. All of these pollutants are known to have harmful effects, whether on the …

Targeted Overexpression Of Metallothionein In Endothelial Cells Mitigates Pulmonary Alveolar Basement Membrane Thickening In Transgenic Diabetic Ove Mice: An Unbiased Tem Morphometric Analysis, Holly M. Hewitt

Theses and Dissertations

Damage to small blood vessels in diabetes mellitus (DM) is largely the result of hyperglycemia-driven oxidative stress. This is manifested morphologically by capillary basement membrane (BM) thickening, the hallmark feature of chronic complications of DM. In an effort to demonstrate pulmonary alveolar BM (PABM) thickness increase in DM and to demonstrate for the first time, mitigation of the increase utilizing antioxidant therapy, we crossed the severely diabetic transgenic mouse (OVE) with Jtmt, our recently developed transgenic animal model that overexpresses the antioxidant metallothionein (MT) in endothelial cells. Unbiased TEM morphometry demonstrated that PABM widths in diabetic (OVE) mice were significantly …

Air Circulation Under Reduced Atmospheric Pressures, Lendell E. Hillhouse

Theses and Dissertations

The control of heat exchange is vital for plant life in off-world, low pressure,

greenhouses. The ability to control this process was limited by methodology and

technology. Mathematical models, based on classical mechanics are created to enhance

our control capabilities. Data is collected using various sensors placed inside the Low

Pressure Test Bed (LPTB) Chamber at Kennedy Space Center. Data from those sensors

became non-linear at various pressures below 25 kPa. We introduced mathematical

calibration corrections and found that sensor data linearity could be extended to a greater

range of pressures. These calibration corrections allow for sensor calibration corrections

in …

An Investigation Of Sub-Pixel Cloud/Clear-Sky Contamination Using Hyper-Spectral Aviris Data, Celil Kaplan

Theses and Dissertations

Cloud and clear sky contamination due to sub-pixel clouds remains as a troubling issue for scientific applications that rely on remotely sensed data. Sub-pixel level clouds may not be detected by a standard cloud filtering process, and thus can cause uncertainties in satellite-based meteorological property retrievals. In this study, using collocated data from Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Geostationary Operational Environmental Satellite (GOES) data, sub-pixel cloud and clear-sky contamination were studied over the west coast of Northern California. The hyper-spectral data from AVIRIS have a spatial resolution on the order of 11.5 m for the study case, thus can …

Neuropsychological Comparisons Of Obsessive-Compulsive Disorder Subtype And Body Dysmorphic Disorder Symptomatology, Linda Renee Keenan

Theses and Dissertations

Body Dysmorphic Disorder (BDD) and Obsessive-Compulsive Disorder (OCD) are often severe and disabling psychiatric conditions. Although BDD is currently regarded as a somatoform disorder in the DSM-IV, it has been suggested that it would be better classified as being part of an obsessive-compulsive spectrum, as it shares many characteristics with OCD in terms of its clinical presentation. Although both disorders have been found to be associated with executive function deficits and other neuropsychological correlates, few studies have compared the two disorders directly in this regard. Further, some research has indicated that OCD symptom dimensions are associated with varying patterns of …

Women's Use Of Intimate Partner Violence: An Examination Of Attachment, Coping, And Gender Ideology, Theresa Elizabeth Magelky

Theses and Dissertations

Until recently, much of the research on intimate partner violence has focused primarily on male aggressors. However, research has increasingly indicated that women use violence against male intimate partners at higher rates than previously suspected. Significant controversy exists with regard to the context, motivation, and types of violence used by women. The current study explored the degree to which female aggressors' attachment styles are associated with and predictive of their use of intimate partner violence against men. In addition, coping processes and feminine ideology were studied, particularly in combination with attachment style, to determine their relationship with use of partner …

Design And Construction Of A Fluidized Bed, Robert Ryan Mota

Theses and Dissertations

Coal combustion is responsible for the majority of electricity production in the United States. It is however, also the primary cause for carbon dioxide emissions, which contribute to global warming. With oil reaching its peak production in the near future, alternative fuel sources will be needed to meet the worlds growing energy demands. Coal is an abundant resource that has the potential to meet those demands. In contrast to coal combustion, coal gasification only partially oxidizes the coal to produce a syngas containing of hydrogen and carbon monoxide, which means less carbon dioxide emissions. Utilizing coal in gasification technologies is …

Family Factors And Perceived Coworker Support And Supervisor Support, Sara Narveson

Theses and Dissertations

This study examines how aspects of family formation relate to coworker support and supervisor support. Studying both coworker support and supervisor support is valuable because they can give us a glimpse of how different people feel about the workplace. Using the theoretical perspective of homophily, which focuses on how people prefer to interact with others who are similar to themselves, it was hypothesized that people who are married or who have children will perceive more coworker support and supervisor support than others. The data set of the 2002 National Study of the Changing Workforce was used. It contained 3,368 cases …

Arsenic And Phosphorus Biogeochemistry In The Ocean: Arsenic Species As Proxies For P-Limitation, Oliver Wurl, Louise Zimmer, Gregory A. Cutter

OES Faculty Publications

Arsenic and phosphorus are biochemically very similar, and hence arsenate (As⁵⁺) is toxic by interfering with the energy metabolism, in particular during P limitation. However, many phytoplankton detoxify As by reducing arsenate to arsenite (As³⁺), and/or methylating it to mono and dimethyl As. Such As detoxification becomes operative in oligotrophic waters when phosphate concentrations are below those for As; therefore, we evaluated the potential use of these detoxification products as indicators of P-limitation by measuring As speciation during the US GEOTRACES North Atlantic transect. The distribution of As³⁺ concentrations in surface waters is similar to …

Financial Development And Human Development In The European Union, Sasa Ostojic

Theses and Dissertations

The relationship between finance and economic growth is often studied using GDP per capita growth. This paper aims to focus on the richness of human life, not the richness of the economy. Thus, the Human Development Index is used to test the relationship between financial development and human development. By focusing on a sample limited to the European Union, the many criticisms associated with the use of an index can be mitigated. At this moment there is not a universally accepted measure of financial development. Use of measures from past literature allowed for consistency with past works. The results show …

Effects Of The Seed Bank And Interseeding In Reconstructed Tallgrass Prairies, Stephen C. Rossiter

Theses and Dissertations

Disturbances such as fire and mowing temporarily increase available resources for plants, opening a window of opportunity for establishment. During the recovery of vegetation after disturbance in remnant prairies, seedling establishment is often negligible compared to vegetative regrowth. It is unclear if this is the case in reconstructions. I tested the contribution of seedlings to diversity after disturbance in two, 25-year-old, low diversity reconstructed prairies by removing seedlings, allowing seedlings, and adding seed in 1 m2 plots. Disturbance frequency effects were tested by clipping each treatment zero, one, or multiple times. After two growing seasons, in the wetter field site, …

Intercalibraton In Chemical Oceanography-- Getting The Right Number, Gregory A. Cutter

OES Faculty Publications

Intercalibration has a strict metrological definition, but in brief, it's an open sharing of methods and results between laboratories to achieve the most accurate data with the fewest random and systematic errors. In the field of chemical oceanography where concentrations of many constituents can be in the nano- to picomolar range, the salt water matrix can be difficult to analyze, and knowing the exact concentrations, or even chemical forms, of biologically required elements is essential, intercalibration is a very relevant and needed tool. Implementing it is not simple because errors can occur at any step in the process of taking …

The Effect Of Participation In Professional Development On Perceived Change In Teaching Practice By Minnesota K-12 Physical Education Teachers, Sally Krause Sertich

Theses and Dissertations

This study used a conceptual framework of professional development theory to identify characteristics of effective learning activities specific to 259 Minnesota K-12 public school physical education and developmental adapted physical education (PE/DAPE) teachers during 2012-2013. Study results confirmed that as PE/DAPE teacher participation in professional development increased, so too did perceived subsequent change in teaching practice. Both reform and traditional structures of professional development were found effective in teacher learning. Teachers who taught solo were less likely to participate in professional development than those who worked alongside PE/DAPE colleagues in the same school. Moreover, teachers who taught solo were less …

Pregnancy, Sexism, And The Greek System, Taylor Marie Walkky

Theses and Dissertations

Both hostile and benevolent sexism have been found to correlate with attitudes related to pregnancy (Terrell et al, in prep). Benevolent and hostile sexism have both been shown to correlate with attitudes towards sorority members as well (Walkky, unpublished). The goal of the present study was to expand on the knowledge of how sexism relates to pregnancy attitudes, especially how it relates to sorority membership. Participants read a scenario about a college woman, who was either in a sorority or not, who had just discovered that she was pregnant. In the scenario, she chose to either end the pregnancy, continue …

Using Ammonium Pore Water Profiles To Assess Stoichiometry Of Deep Remineralization Processes In Methanogenic Continental Margin Sediments, David J. Burdige, Tomoko Komada

OES Faculty Publications

In many continental margin Sediments, a deep reaction zone exists which is separated from remineralization processes near the sediment surface. Here, methane diffuses upward to a depth where it is oxidized by downwardly diffusing sulfate. However, the methane sources that drive this anaerobic oxidation of methane (AOM) in the sulfate-methane transition zone (SMT) may vary among sites. In particular, these sources can be thought of as either (i) "internal" sources from in situ methanogenesis (regardless of where it occurs in the sediment column) that are ultimately coupled to organic matter deposition and burial, or (ii) "external" sources such as hydrocarbon …

Surface Production Fuels Deep Heterotrophic Respiration In Northern Peatlands, J. Elizabeth Corbett, David J. Burdige, Malak M. Tfaily, Angela R. Dial, William T. Cooper, Paul H. Glaser, Jeffrey P. Chanton

OES Faculty Publications

Multiple analyses of dissolved organic carbon (DOC) from pore waters were conducted to define the processes that govern carbon balance in peatlands: (1) source, reactivity, and transport of DOC with respect to vegetation, peat, and age of carbon substrate, (2) reactivity of DOC with respect to molecular size, and (3) lability to photoxidation of surficial DOC. We found that surface organic production fuels heterotrophic respiration at depth in advection-dominated peatlands, especially in fens. Fen DOC was Δ¹⁴Cenriched relative to the surrounding fen peat, and fen respiration products were similar to this enriched DOC indicating that DOC was the …

Tbi And Long-Term Competitive Employment As A Function Of Services Provided By Vocational Rehabilitation, Natasha Dawn Adamson

Theses and Dissertations

Objective: Research has demonstrated the importance of vocational rehabilitation (VR) for individuals with traumatic brain injury (TBI) who seek competitive long-term employment. Unfortunately, there has been minimal research on the provision of services provided by VR as a moderating factor, and almost non-existent research for individuals in rural regions. Research in this area is crucial given that the services are provided as a way to increase the individual's likelihood of overcoming barriers to gaining employment. Therefore, this study focused on individual's diagnosed with TBI who are clients of North Dakota's Division of Vocational Rehabilitation (DVR) and the connection between services …

Variations Of E-Region Total Electron Content And Electron Density Profiles Over High Latitudes During Winter Solstice 2007 Using Radio Occultation Measurements, Kajli Agrawal

Theses and Dissertations

The space weather phenomenon involves the Sun, interplanetary space and the Earth. Different space weather conditions have diverse effects on the various layers of the Earth's atmosphere Technological advancements have created a situation in which human civilization is not only dependent on resources from deep inside the Earth, but also on the upper atmosphere and outer space region. Therefore, it is essential to improve the understanding of the impacts of space weather conditions on the ionosphere. This research focuses on the variation of total electron content (TEC) and the electron density within the E-region of the ionosphere, which extends from …

The Effect Of Birth Order On Age At First Sex And Total Number Of Lifetime Sexual Partners, Lacey Christine Clark Anderson

Theses and Dissertations

Research in the field of birth order is expansive and has been used to explain many social processes, including the sexual behavior of young adults. However, results regarding the influence of birth order on risky sexual behavior are somewhat limited, sometimes contradictory, and often lack generalizability to larger populations. In this thesis, using

data from the National Health and Social Life Survey (1992) and multiple regression techniques, I investigate the influence of ordinal position on two measures of sexual behavior,age at first sex and total number of lifetime partners, among young adults age 18 to 30. Results show that birth …

Josephson Currents In Two-Gap Superconductor-Insulator- Superconductor Junctions, Ladan Bahrainirad

Theses and Dissertations

As a way to investigate the transport property of superconductor-insulator-superconductor (SIS) junction with two-gap superconductors such as MgB2 and iron superconductors, we study the microscopic structure of the Josephson current in a tunnel junction with a very narrow quasi-classical barrier. Also, the possibility of mid-gap states in two-gap superconductor is investigated, and their effects on the current-phase relation as well as the current density characteristics are studied. In the SIS break junction, mid-gap states appear at the Superconductor-Insulator interfaces due to an abrupt change in the superconducting order parameter, indicating that the two-gap superconductor SIS junction can yield a rich …

An Investigation Of The Relationships Among Instructional Congruence, Burnout And Attrition In Undergraduate Music Theory Students, Whitney Blaire Berry

Theses and Dissertations

Music theory is a core course in all undergraduate music degree programs. Students enter this course with varying degrees of prior subject matter knowledge, which presents a challenge to music theory teaching and learning. An incongruence between the student's prior knowledge and the level of instruction can negatively affect learning, mental health and persistence in the course sequence.

The purpose of this study was to determine what relationships exist among instructional congruence, burnout and attrition in undergraduate music theory students. A survey was developed and administered to music theory students at four universities in the upper Midwest (95.5% response rate, …

Exploring The Differences In Deep Convective Transport Characteristics Between Quasi-Isolated Strong Convection And Mesoscale Convective Systems Using Seasonal Wrf Simulations, Brandon Clifford Bigelbach

Theses and Dissertations

It has been shown in several previous studies that there is a relationship between mesoscale storm type and deep convective mass transport characteristics. For example, a previous simulation study showed that a supercell storm transported significantly more

tracers into the stratosphere than did a multicell storm in an environment with identical thermodynamic structure. We utilize the Weather Research and Forecasting (WRF) model (version 3.2.1) with chemistry to simulate mass transport during the convective season of 2007 in the U.S. Southern Great Plains at convection-resolving scale (2 km). The storms that were resolved in the model were then classified using an …

The Impact Of The Perceptions Of Fathering On Adult Children's Emotional Well-Being And Satisfaction With Life, Abraham John Bilyeu

Theses and Dissertations

The purpose of the present study was to examine how perceptions of one's father figure impacted reported levels of depression, anxiety, stress, alexithymia, and satisfaction with life. Participants reported that as negative perceptions of their father figure increased so did reported levels of depression, anxiety, and stress. Further, negative perceptions of one's father figure were negatively correlated with life satisfaction, such that as negative perceptions of father increased ones reported satisfaction with life decreased. Participant age was also positively correlated with perceptions of their father, whereas age increased, so did a positive view of one's father figure. When the Attitude …

Lovegods And Other Short Stories, Therese Borkenhagen

Theses and Dissertations

This thesis is a collection of four stories, which are all rooted in my Norwegian heritage. Two of the stories are historical narratives based on the German occupation of Norway, and the other two take place in an unspecified presence. The stories deal largely with familial relationship and abandonment, but also include themes such as illness, war, and sexuality. I employ a variety of writing styles, inspired by, but not limited to, authors such as Franz Kafka, Erlend Loe, Ernest Hemingway, and Miranda July. I also experiment with time, language, and cultural references. Along with my stories, I am including …

Professional Socialization In Nurse Anesthesia Educational Programs: Attitudes And Beliefs Of Faculty Members And Recent Graduates, Kevin Buettner

Theses and Dissertations

The purpose of this study was to better understand professional socialization in nurse anesthesia educational programs through an exploration of the attitudes and beliefs of faculty members and recent graduates. Participants for this cross-sectional, quasi-experimental online study included a convenience sample of 178 nurse anesthesia faculty members and 399 recent graduates of nurse anesthesia educational programs in the United States. Measures in this study explored the importance, recent graduate preparation, and influence on professional socialization outcomes (e.g., professional development, scholarly activity/critical inquiry, professional ethics, and professional and social responsibility). The effect of cohort size and instructional delivery method were also …

Experimental Investigation Of The Effect Of Turbulence On Slot-Fed Film Cooling Adiabatic Effectiveness And Downstream Heat Transfer, Mitch Busche

Theses and Dissertations

Modern turbine designers are greatly concerned with power out and the efficiency of their engines. One way to increase the power output and effectiveness of the engine is to increase the hot gas temperature inside the combustion chamber. The hot gas can reach a temperature that exceeds the physical limitations of parts inside the engine, causing the parts to fail prematurely. One possible method to cool the parts is with the use film cooling. Film cooling takes cool air from the compressor, bypasses the combustor, and ducts the air to internal chambers of parts, and then ejects the cool air …

It's In Minnesota's Nature: An Exploration Into Building Social Capital Through Place Branding, Alyssa Michelle Chandler

Theses and Dissertations

Place branding is a growing practice in communities worldwide. While much academic research has been conducted on the subject, the majority is directed toward the study of tourist perceptions. Research on those living in a branded community is limited. Therefore, this study seeks to explore how a place brand could build or strengthen social capital among residents of a location through a shared representation of a community's identity. A case study was conducted in Grand Rapids, Minnesota where 30 residents were interviewed from diverse socio-economic backgrounds. Through the lens of the seven community capitals, discussed in Flora and Flora (2009), …

Development And Outcomes Of An Experientially-Based Nonverbal Social Skills Curriculum For Youth With Visual Impairments, Rebecca J. Cicha

Theses and Dissertations

The importance of social skills training for youth with visual impairments has been widely researched within educational and rehabilitation settings. To date, social skills training curricula for visually impaired youth have largely utilized verbally-based methods for instruction and training. Given the non-visual aspects of human communication, it is proposed that verbal approaches to nonverbal social skills training may not be sufficient for visually impaired individuals. To address this issue, an experiential curriculum of nonverbal social skills training was developed that emphasized hands-on learning and practice of nonverbal social skills. This curriculum was administered to seventeen visually impaired youth attending short-term …

Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering, Dipesh Das

Theses and Dissertations

The Grand Forks Waste Water Treatment Plant (GFWWTP) is currently sending its waste activated sludge (WAS) from the activated sludge treatment process to an existing on-site wastewater treatment lagoon which has been in operation since 2003. The plant produces approximately 65,000 gallons of WAS per day. Because of this high level of loading, the existing lagoon system is no longer considered as a treatment option for the produced sludge. The Plant Authority is trying to find a sustainable solution for sludge disposal and for this reason the GFWWTP is interested in introducing screw press system for the dewatering process. As …

An Analysis Of Theoni Aldredge's Life And Career, Matthew Scott Dempsey

Theses and Dissertations

This thesis examines the life and career of costume designer Theoni Aldredge. Using her extensive career and connections to the theatrical field observations will be made regarding some interactions fashion and technology have with costuming, as well as defining qualities of performance genres.