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.
Results
Showing 1 to 20 of 35 for “"Swenson College of Science and Engineering"”.
-
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. …
-
Characterizing the role of ATP-binding cassette transporters in triterpenoid wax bloom production
… However, the process underlying 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 …
-
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 …
-
Use Of Multi-Gear Sampling To Improve Abundance Estimates Of Demersal Coregonids In The Laurentian Great Lakes
… Lake Whitefish (Coregonus clupeaformis) and Round Whitefish (Prosopium cylindraceum) play a vital role in both the Laurentian Great Lakes food webs and the commercial fishing industry. Hydroacoustic sampling has proven useful when performing stock assessments because hydroacoustics …
-
Analysis of Contaminants on Ground Glass Pozzolan and the Effects on Pozzolan Performance in Mortar
… ground glass pozzolan as a replacement for portland cement can reduce the CO2 emissions associated with concrete production and utilize waste glass that would otherwise end up in landfills. In the United States, municipal solid waste (MSW) stream recycling operations collect plastic, glass, …
-
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 …
-
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 …
-
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 …
-
Drivers of reproductive variability in Vaccinium cespitosum and vaccinium vitis-idaea in northeastern Minnesota
… reproductive variability within a population, and understanding these factors is important for making informed land management decisions. I investigated how clonality impacts reproductive variability in Vaccinium cespitosum and Vaccinium vitis-idaea (Ericaceae), and how the history of land …
-
Past precipitation, watershed characteristics, and drought: interactive effects on watersheds of Northern California.
… change, which impacts drinking water resources and stresses vulnerable aquatic species. Watershed properties, such as aspect, elevation, soil type, vegetation composition, and stand age, are known to impact runoff through differences in evapotranspiration and storage. Drought may further change …
-
Long-Term Hydrologic Sustainability of Calcareous Fens Along Glacial Lake Agassiz Beach Ridges, Northwestern Mn
Calcareous fens are peat-accumulating wetlands fed by calcium-rich groundwater 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 …
-
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 …
-
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 …
-
Optimizing a long-term monitoring program to track toxic cyanobacteria blooms in a Great Lakes estuary
… blooms (cHABs) have become increasingly frequent and severe in the St. Louis River 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 …
-
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, …
-
Robot-Assisted Physical Therapy for cognition and motor skill enhancement in people with dementia.
… in early stages, resulting in memory loss and gradually affecting mobility and movements in carrying out daily living activities in the elderly population. It poses significant challenges in healthcare, particularly in the context of caregiving and therapeutic interventions aimed at …
-
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 …
-
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 …
-
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 …
-
Annotating and Automatically Extracting Task Descriptions from Shared Task Overview Papers in Natural Language Processing Domains
The rapid growth rate of scientific literature makes it increasingly difficult for researchers to keep up with developments in their field. This is a problem that can be addressed by structuring academic papers according to information units that go deeper than keywords. The need to efficiently …
Page 1 of 2