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The Time-Dependent Ionospheric Model Using A Tec-Driven Servo: An Investigation Of The Capabilities And Limitations, Jenny Rebecca Whiteley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ionosphere is a region of the atmosphere with a high density of electrons. These electrons affect the behavior of any electromagnetic wave that passes through the ionosphere. Communication and geolocation systems, such as traditional radio and Global Positioning Systems, depend on emitted electromagnetic signals being picked up by a receiver. The presence of the ionosphere affects the behavior of the signal and the quality of the service. Hence, the interactions between electromagnetic waves and the ionosphere provide a major motivation to understand, research, and successfully model and predict the ionosphere and its physical phenomena. This study focused on determining …

Concept Validation: Collecting Composite Samples To Understand The Presence Of Per- And Polyfluoroalkyl Substances (Pfas) In Michigan Forested Areas, Nicole Renee Sanabria

Masters Theses

This research discusses the results of a state-wide study conducted by The Michigan Department of Environment, Great Lakes, and Energy to assess the presence of PFAS in shallow soils of state-owned forested areas in Michigan utilizing a composite sampling method. One sample collected from each of Michigan’s 83 counties reveals the presence of PFAS in all but one sample, with total PFAS concentrations ranging from non-detect to 2.016 μg/kg (dry weight). PFOS is generally detected at the highest concentrations, ranging from non-detect to 0.88 μg/kg, followed by PFBA, with concentrations ranging from non-detect to 0.69 μg/kg, and PFOA, with concentrations …

Effects Of A 12-Week Plant-Based Diet Program On Obese And Overweight Adults In Rural Michigan, Nadine Larcher

Doctor of Nursing Practice Projects

Background

Overweight and obesity among adults are a rising epidemic in the U.S. Obesity is a risk factor for many chronic diseases and impacts morbidity and mortality. Despite our high-tech medical care system in the U.S., we are losing the war on obesity due to not addressing the underlying problems. These include unhealthy lifestyles and an unhealthy diet. A growing body of research studies has shown that adopting a low-fat whole food plant-based diet (WFPBD) regime consisting of whole grains, fruits, vegetables, legumes, and no animal-based products is an effective measure to counteract the rising pandemic of chronic diseases related …

Investigating Michigan’S Skilled Construction Laborer Shortage Within The Great Lakes Region, Jennifer E. Russell

Master's Theses and Doctoral Dissertations

The construction industry has been facing a decline in skilled trade labor for decades. This study asks three overarching questions: (a) What are the causes and influencing factors of Michigan’s skilled construction laborer shortage? (b) How are Michigan stakeholders in the Great Lakes Region remedying the shortage? (c) What new solutions can be implemented to remedy Michigan’s skilled construction laborer shortage? A literature review was conducted to identify causes, influencing factors, and research gaps. Closed surveys questioning 69 construction project managers and 101 skilled trade laborers in Michigan were conducted online and on construction sites. A quantitative analysis of the …

Structural Analysis And Interpretation Of Deformation Along The Keweenaw Fault System From Lake Linden To Mohawk, Michigan, Nolan G. Gamet

Dissertations, Master's Theses and Master's Reports

The Keweenaw fault is likely the most significant and most studied fault associated with the Midcontinent Rift System. The fault roughly bisects the Keweenaw Peninsula and places Portage Lake Volcanics (~1.1 Ga) over much younger Jacobsville Sandstone (~1.0 Ga). Published bedrock geology maps with cross sections from the 1950s show the fault as a single continuous trace that is locally associated with smaller cross faults and splays. The accompanying cross-sections show hanging-wall volcanic strata having a well-defined, listric geometry with dip decreasing away from the fault to the northwest.

This M.S. thesis presents a structural analysis and interpretation of the …

Age And Chemistry Of Bell Creek Batholith, Elana G. Barth

Dissertations, Master's Theses and Master's Reports

The Southern Complex, located near Marquette, Michigan is in the southernmost portion of the Superior Province. This complex consists of granitoids and granitic gneiss that vary in composition. In twentieth century research, Hoffman (1987) and Tinkham (1997) concluded that the Southern Complex contained two units in which the granitoid was emplaced in the granitic gneiss. Recent research conducted by Petryk (2019) determined that the Southern Complex has a U-Pb zircon age of 2600 Ma. Dalle Fratte (2020) concluded that the granitic gneiss migmatite texture was the result of a felsic magma mixing with several generations of mafic intrusions that were …