Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"University of Minnesota Duluth"”.
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Dramaturgy: Kurt Well's 'Street Scene': An American Opera and the American Immigrant's Experience
<p>This paper is a reflection of the dramaturgical thesis project performed at the University of Minnesota-Duluth. The Theatre Department's production of Kurt Well's <em>Street Scene</em> was a platform of the project. In this paper, I explore the dramaturgical process and the connection of the …
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Closing the knowledge gap surrounding nitrogen cycling in Minnesota lakes
… in aquatic systems leads to hypoxia, loss of biodiversity and harmful algal blooms. Allochthonous inputs are typically the critical drivers of eutrophication, but it is also important to understand how those inputs interact with internal processes to characterize future N scenarios. …
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Characterizing the role of ATP-binding cassette transporters in triterpenoid wax bloom production
… synthesis and especially the transport of wax bloom compounds to the leaf surface have yet to be fully elucidated. Numerous ATP-binding cassette (ABC) transporters have been characterized in model systems and crops, and some members of the G transporter subfamily are linked to the …
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Temporal Change in Community Composition, Ecological Niche, and Phenotypic Selection in Minnesota’s Rare Arctic Relict Plants
Rare, arctic relict plant populations of Minnesota, found in the cool and moist microclimate produced along the cold waters of Lake Superior, face an uncertain future due to anthropogenic climate change. In this study, we used a variety of approaches to examine the contemporary impacts of climate …
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Use Of Multi-Gear Sampling To Improve Abundance Estimates Of Demersal Coregonids In The Laurentian Great Lakes
… to other assessment methods. The objective of this study is to develop an accurate hydroacoustic sampling method for measuring the abundance and distribution of Lake Whitefish and other demersal species in the nearshore habitat of the Wisconsin management unit 2 where there is an active Lake …
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Analysis of Contaminants on Ground Glass Pozzolan and the Effects on Pozzolan Performance in Mortar
… this manner can contain an unknown concentration of various contaminants on its surface, which can cause concern for concrete producers concerned about the effect on performance. Using analytical chemistry techniques combined with mortar physical testing, it is possible to better understand what …
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Multilevel Buck Converter Topologies and Their Applications
… buck topologies eliminate the limitations of conventional buck converters in some specific areas. In this thesis, novel multilevel buck topologies are proposed to meet the specific requirements of two particular applications respectively. In case I, a two-stage power conversion structure …
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Timing and pattern of valley excavation, Le Sueur River, south-central Minnesota, USA
Strath terraces of the Le Sueur River, south central Minnesota, preserve the record of river incision. A combination of airborne LiDAR (light detection and ranging) and terrace dating through optically-stimulated luminescence (OSL) and radiocarbon methods were used to construct a conceptual model …
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Diel and horizontal patterns in the densities of Bythotrephes, Chaoborus, and Leptodora in a Minnesota Reservoir
Understanding the simultaneous distributions of three invertebrate planktonic predators—Bythotrephes cederstroemii, Chaoborus punctipennis, and Leptodora kindtii—in one system can help describe food web dynamics and inform management decisions. The population densities of these three species were …
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Drivers of reproductive variability in Vaccinium cespitosum and vaccinium vitis-idaea in northeastern Minnesota
… vitis-idaea (Ericaceae), and how the history of land management affects reproductive variability in V. cespitosum. Vaccinium populations with a history of land management are expected to have higher reproductive potential than populations that have not been managed, as land management has been …
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Past precipitation, watershed characteristics, and drought: interactive effects on watersheds of Northern California.
… and stand age, are known to impact runoff through differences in evapotranspiration and storage. Drought may further change the hydrological function, or precipitation-runoff relationship of a watershed. In this study, I investigated how watershed properties provide resilience against …
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Long-Term Hydrologic Sustainability of Calcareous Fens Along Glacial Lake Agassiz Beach Ridges, Northwestern Mn
… that support several threatened species of plants that evolved to thrive in these geochemical conditions. Fifty-three of Minnesota’s nearly 300 identified calcareous fens are located in the Glacial Lake Agassiz beach ridge complex in northwestern Minnesota. Each of these fens is located …
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Immediate Deflection Calculations Of Transition And Cracked Prestressed Concrete Sections
Prestressed concrete is commonly used in floor, roof, and bridge members. In prestressed concrete, the steel strands are tensioned/pulled and then concrete is cast around the strands in the form. Once the concrete has set, the strands are cut, and the member is put into compression from the …
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A method for correlation of gravestone weathering and air quality (SO2), West Midlands, UK
From the beginning of the Industrial Revolution through the environmental revolution of the 1970s Britain suffered the effects of poor air quality primarily from particulate matter and acid in the form of NOx and SOx compounds. Air quality stations across the region recorded SO2 beginning in the …
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Optimizing a long-term monitoring program to track toxic cyanobacteria blooms in a Great Lakes estuary
… Estuary (SLRE) since 2018. Given the novelty of cHABs in the SLRE, the locations, timing, and environmental conditions associated with past cHABs have remained largely unknown, complicating efforts to establish comprehensive but resourceful monitoring of cHAB-relevant data. We aimed to answer …
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Fibronectin and Laminin, extracellular matrix proteins, have an origin in mesoderm tissue and promote anterior neural tube closure in zebrafish
… nervous system, forms through the process of neurulation. During neurulation, a flat neural plate folds and the lateral edges bind to form a closed tube. Failure of neurulation results in neural tube defects (NTD). In humans, NTD causes life-threatening birth defects such as anencephaly, …
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Robot-Assisted Physical Therapy for cognition and motor skill enhancement in people with dementia.
… in healthcare, particularly in the context of caregiving and therapeutic interventions aimed at enhancing patients’ physical and cognitive functions. This study investigates the efficacy of robot-assisted therapies to improve cognition and motor skills for individuals affected with …
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Left-handed BCI - examining effects of handedness and hand dominance on EEG grasp classification
Brain-Computer Interfaces (BCIs) are of high potential use to individuals whosemotor function is impaired, or who have undergone a loss of limb or limb functionality. Electroencephalography (EEG) is one popular method of collecting signals from the brain, and is commonly used in cases where other …
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Biological Iron Limitation within Lake Superior's Watershed: Oligotrophic Algal Blooms Along a Land to Lake Gradient
Growing amounts of freshwater literature highlight phytoplankton iron limitation in systems of varying hydrology and trophic status. Furthermore, global trends of increased dissolved iron in lakes could play an important role in relieving iron limitation. Concurrent rises in oligotrophic harmful …
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Characterizing spatial and temporal trends in fish community diversity in the inland lakes of Isle Royale, MI, USA
The inland lakes of Isle Royale, MI have remained relatively isolated from human impact, providing an opportunity to explore how fish diversity has natural shifted with minimal confounding effects. I analyzed fish assemblages of 23 lakes sampled in the 1920s, 1990s, and 2020s to 1) assess temporal …
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