Digital Commons Network^™

Improving Everyday Computing Tasks With Head-Mounted Displays, James Walker

Dissertations, Master's Theses and Master's Reports

The proliferation of consumer-affordable head-mounted displays (HMDs) has brought a rash of entertainment applications for this burgeoning technology, but relatively little research has been devoted to exploring its potential home and office productivity applications. Can the unique characteristics of HMDs be leveraged to improve users’ ability to perform everyday computing tasks? My work strives to explore this question.

One significant obstacle to using HMDs for everyday tasks is the fact that the real world is occluded while wearing them. Physical keyboards remain the most performant devices for text input, yet using a physical keyboard is difficult when the user can’t …

Computational Ultrasound Elastography: A Feasibility Study, Yu Wang

Dissertations, Master's Theses and Master's Reports

Ultrasound Elastography (UE) is an emerging set of imaging modalities used to assess the biomechanical properties of soft tissues. UE has been applied to numerous clinical applications. Particularly, results from clinical trials of UE in breast lesion differentiation and staging liver fibrosis indicated that there was a lack of confidence in UE measurements or image interpretation. Confidence on UE measurements interpretation is critically important for improving the clinical utility of UE. The primary objective of my thesis is to develop a computational simulation platform based on open-source software packages including Field II, VTK, FEBio and Tetgen. The proposed virtual simulation …

Analysis Of Aleks Mathematics Placement Test Data, Teresa Woods

Dissertations, Master's Theses and Master's Reports

In Fall 2014, Michigan Technological University (MTU) began using an online mathematics placement test provided by ALEKS Corporation. This study answers three questions that accompanied this implementation: (1) Do the cut scores being used for Precalculus and Calculus I result in the expected pass rates for those courses?, (2) Does the path by which a student becomes eligible for Calculus I – via a single placement test attempt, via multiple placement test attempts, or by beginning in Precalculus at MTU – influence their likelihood of success in Calculus I?, and (3) Does a mathematical background weak in any particular curriculum …

Characterization Of Ecological Water Stress In The U.S. Great Lakes Region Using A Geospatial Modeling Approach, Sara Alian

Dissertations, Master's Theses and Master's Reports

Anthropocentric water resources management affects aquatic habitats by changing streamflow regime. Understanding the impacts of water withdrawal from different sources and consumption by various economic sectors at different spatial and temporal scales is key to characterizing ecologically harmful streamflow disturbances. To this end, we developed a generic, integrative framework to characterize catchment scale water stress at annual and monthly time scales. The framework accounts for spatially cumulative consumptive and non-consumptive use impacts and associated changes in flow due to depletion and return flow along the stream network. Application of the framework to the U.S. Great Lakes Region indicates that a …

Language, Rhetoric, And Politics In A Global Context: A Decolonial Critical Discourse Perspective On Nigeria’S 2015 Presidential Campaign, Yunana Ahmed

Dissertations, Master's Theses and Master's Reports

In this dissertation, I conceptualize a rhetorical and linguistic analysis of politics from a decolonial framework (Mignolo, 2011; Smith, 2012). My analysis draws on classical rhetoric (Aristotle, 2007), cultural rhetoric (Mao, 2014; Powell, et al., 2014; Yankah, 1995), and linguistics (Chilton, 2004) to reveal the different ways ideological and hegemonic struggles are discursively constructed in Nigerian political campaign discourse. The data for this study come from two speeches delivered by former President of Nigeria Goodluck Jonathan during the 2015 electoral campaign. This includes his declaration-of-intent speech and his speech marking the commencement of his formal campaign activities. My …

From Female Engineering Co-Op To Cyborg Engineer: Purposeful Participation Within The Binaries Of A Community Of Practice, Kirsti M. Arko

Dissertations, Master's Theses and Master's Reports

In order to fill the current employment gaps in STEM, specifically engineering, initiatives have shifted towards increasing the number of women and minorities, who are both significantly underrepresented. (National Science Board, 2016) If cooperative education is to participate in this, we must first ensure the unique qualities of the women’s co-op experience are adequately understood for practitioners to assist in setting the women up for success and best meeting their needs. Cooperative education research on female co-ops is limited, thus missing out on an opportunity to assist in these national initiatives. This dissertation provides a study on female engineering co-op …

A Landscape Of Water And Waste: Heritage Legacies And Environmental Change In The Mesabi Iron Range, John Baeten

Dissertations, Master's Theses and Master's Reports

This dissertation explores the intersection between mining technology, industrial heritage, and environmental history, using iron mining in the Mesabi Range of the Lake Superior Iron District as its core case study. What impact did technological shifts in iron mining and ore processing have on the environment of the Lake Superior basin? How did the environmental changes wrought from low-grade iron ore mining and processing, such as the expansion of open-pits and the production of tailings, affect different communities in Minnesota’s Mesabi Range? And finally, how have the environmental legacies of iron mining been remembered and memorialized, or ignored and forgotten?

Development Of A High-Fidelity Model And Kalman Filter Based State Estimator For Simulation And Control Of Nox Reduction Performance Of A Scr Catalyst On A Dpf, Venkata Rajesh Chundru

Dissertations, Master's Theses and Master's Reports

Reduction of emissions and improving the fuel consumption are two prime research areas in Diesel engine development. The present after-treatment systems being used for emissions control include diesel oxidation catalyst (DOC) for NO, HC and CO oxidation along with catalyzed particulate filters for PM (particulate matter) and selective catalytic reduction (SCR) for controlling NOx emissions. Recently an after-treatment system called SCR catalyst on a DPF capable of simultaneously reducing both NOx and PM emissions has been developed in order to reduce the overall size of the after-treatment system.

The goal of this proposed research is to create a state estimator …

Portulaca Oleracea Extract Can Inhibit Nodule Formation Of Colon Cancer Stem Cells By Regulating Gene Expression Of Notch Signal Transduction Pathway, Li Chen

Dissertations, Master's Theses and Master's Reports

The main aim of this study was to investigate the effects of Portulaca oleracea extract on tumor formation in colon cancer stem cells and chemotherapy sensitivity. In addition, this study analyzed the genetic changes within the Notch signal transduction pathway associated with the effects of the extracts. Serum-free cultures of colon cancer cells (HT-29) and HT-29 stem cells were treated with the chemotherapeutic drug 5-FU to assess sensitivity. Injections of the stem cells were also given to BALB/c mice to confirm tumor growth and characteristics. In addition, the effect of different concentrations of P. oleracea extract was tested on the …

Heterogeneous Multi-Sensor Fusion For 2d And 3d Pose Estimation, Hanieh Deilamsalehy

Dissertations, Master's Theses and Master's Reports

Sensor fusion is a process in which data from different sensors is combined to acquire an output that cannot be obtained from individual sensors. This dissertation first considers a 2D image level real world problem from rail industry and proposes a novel solution using sensor fusion, then proceeds further to the more complicated 3D problem of multi sensor fusion for UAV pose estimation.

One of the most important safety-related tasks in the rail industry is an early detection of defective rolling stock components. Railway wheels and wheel bearings are two components prone to damage due to their interactions with the …

The Effects Of Early Pruning On The Near-Ground Branch Density Of Four Live Fencing Species, Aric Devens

Dissertations, Master's Theses and Master's Reports

Crop losses in home gardens greatly impact the wellbeing of rural West African families. Herbivory by migratory or local livestock represents a significant source of crop loss. Live-fencing gardens with thorny hedges is a low-cost and sustainable strategy for reducing losses due to herbivory. However, guidance on the establishment of thorny hedges is inconsistent, poorly publicized, and often anecdotal. Therefore, this study evaluated the effects of three early pruning treatments on near-ground branch density of four thorny species: Vachellia nilotica, Senegalia laeta, Senegalia mellifera, and Prosopis juliflora. Physical measurements and photographic data indicated that after one growing season, V. …

Distance Magic-Type And Distance Antimagic-Type Labelings Of Graphs, Bryan Freyberg

Dissertations, Master's Theses and Master's Reports

Generally speaking, a distance magic-type labeling of a graph G of order n is a bijection f from the vertex set of the graph to the first n natural numbers or to the elements of a group of order n, with the property that the weight of each vertex is the same. The weight of a vertex x is defined as the sum (or appropriate group operation) of all the labels of vertices adjacent to x. If instead we require that all weights differ, then we refer to the labeling as a distance antimagic-type labeling. This idea can be generalized …

Simulation Study On Effect Of Gas Charging And Egr In A Dual-Fuel Engine, Satyavenkata Naga Sai Sharath Gorthy

Dissertations, Master's Theses and Master's Reports

Natural gas combined with diesel as micro pilot has the capabilities of achieving lower NOx and soot emissions. Optimization of the combustion process in engines with natural gas and diesel micro-pilot is essential to achieve higher efficiencies and loads. Gas charging (intake air boosting) and EGR are two technologies which when implemented in the natural gas-diesel engines, provide the opportunity to achieve higher efficiencies and loads and low emissions. Simulation study is one of the approaches to investigate the extent and effects of gas charging and EGR on the performance of the engine. With the rapid improvements over the past …

Development Of Bioinformatics Tools And Algorithms For Identifying Pathway Regulators, Inferring Gene Regulatory Relationships And Visualizing Gene Expression Data, Chathura J. Gunasekara

Dissertations, Master's Theses and Master's Reports

In the era of genetics and genomics, the advent of big data is transforming the field of biology into a data-intensive discipline. Novel computational algorithms and software tools are in demand to address the data analysis challenges in this growing field. This dissertation comprises the development of a novel algorithm, web-based data analysis tools, and a data visualization platform. Triple Gene Mutual Interaction (TGMI) algorithm, presented in Chapter 2 is an innovative approach to identify key regulatory transcription factors (TFs) that govern a particular biological pathway or a process through interaction among three genes in a triple gene block, which …

Heterologous Expression And Purification Of Full-Length Human Polybromo-1 Protein, Sarah Hopson

Dissertations, Master's Theses and Master's Reports

Over the past decade, it has become apparent that the human polybromo-1 protein (BAF180) has a critical role in cancer. BAF180 is known to be a driver mutation in clear cell renal cell carcinoma, where it has been found to be mutated in approximately 40% of cases. Mutations have also been found in several other cancers, including intrahepatic cholangiocarcinomas and epithelioid sarcomas. BAF180 is the chromatin targeting subunit of the PBAF (Polybromo-associated BRG1-associated factor) chromatin remodeling complex, a role facilitated by its nine domains: six bromodomains, which recognize and bind to acetylated lysines on histones; two BAH (bromo-adjacent homology) domains, …

Neutral And Adaptive Genetic Variation In North American Hardwood Tree Species, Sudhir Khodwekar

Dissertations, Master's Theses and Master's Reports

'Northern Hardwoods,’ are a characteristic composition of multiple tree species and a part of the rich and diverse northeastern forests. Hardwoods e.g. oaks (Quercus: Fagaceae and Sugar maple), serve as foundation species and offer ecological and economical gains to wildlife and humans. Most of the forest trees go through many biotic and abiotic stresses, for example climate change in their long life span. To overcome these threats and to adapt to changing conditions, tree species need to maintain variation especially in adaptive genes. Therefore, it is necessary to analyze genetic diversity within forest tree populations and take appropriate …

Assessing Assessments: A Comparative Study Of Three Assessments Of Inquiry Skills In Tenth Grade High School Biology Students, Heather K. Murphy

Dissertations, Master's Theses and Master's Reports

Inquiry is an educational technique where students develop scientific knowledge and understanding through processes similar to those used by scientist. One of the obstacles to implementing the techniques is the need for teachers to self-evaluate their teaching and determine the effectiveness of inquiry-based teaching techniques with respect to developing higher-order thinking (HOT) skills in students. Feedback from an assessment permits teachers to adjust their curriculum to incorporate the most effective inquiry-base lessons.

This report considers three short assessments of inquiry that were modified for use in the high school biology classroom. First there three assessments were compared against one another …

Magnetic Petrophysics Of The Vulcan Iron Formation (Michigan, Usa), Matthew Laird

Dissertations, Master's Theses and Master's Reports

A detailed investigation of magnetic properties of the iron-bearing Traders and Curry members of the ~1.88 Ga Vulcan Iron Formation (Michigan’s eastern Upper Peninsula) was conducted using natural remanent magnetization, low-field magnetic susceptibility, anisotropy of magnetic susceptibility, thermomagnetic and magnetic hysteresis, and first-order reversal curve analyses. A set of samples were also investigated using electron scanning microscopy and energy dispersive spectrometry. Contrary to previously accepted views, our results indicate that the Traders and Curry members have substantially different properties. The older Traders member is a typical banded iron formation characterized by a higher relative amount of magnetite and stronger magnetic …

Understanding Perceptions Of Barriers To International, Interdisciplinary Scientific Teamwork And The Expansion Of Mexican Oil Palm Plantations, Erin Pischke

Dissertations, Master's Theses and Master's Reports

Understanding the multiple drivers of environmental change is essential for devising strategies for overcoming impacts and planning for the future. Anthropogenic causes and physical impacts of such environmental changes are not fixed in space; thus, it is necessary to conduct international research to solve such problems by integrating multiple disciplinary approaches. My dissertation research examines the public perceptions of socioecological impacts of oil palm production and uncovers barriers that international, interdisciplinary teams face when studying such impacts. In one chapter, I present research that identifies challenges that interdisciplinary researchers are confronted with when working in an international setting. Findings show …

An Algorithm For Reconstructing Three-Dimensional Images From Overlapping Two-Dimensional Intensity Measurements With Relaxed Camera Positioning Requirements, With Application To Additive Manufacturing, Siranee Nuchitprasitchai

Dissertations, Master's Theses and Master's Reports

Cameras are everywhere for security purposes and there are often many cameras installed close to each other to cover areas of interest, such as airport passenger terminals. These systems are often designed to have overlapping fields of view to provide different aspects of the scene to review when, for example, law enforcement issues arise. However, these cameras are rarely, if ever positioned in a way that would be conducive to conventional stereo image processing. To address this, issue an algorithm was developed to rectify images measured under such conditions, and then perform stereo image reconstruction. The initial experiments described here …

Developing A Gis Tool For Infinite Slope Stability Analysis (Gis-Tissa), Jonathon Sanders

Dissertations, Master's Theses and Master's Reports

The Probabilistic Infinite Slope Analysis model (PISA-m) is a widely used computer program that uses infinite slope equations to calculate the spatially varying Factor of Safety of slopes. ESRI’s ArcGIS software and accompanying geoprocessing tools have become a mainstay in spatial data processing, and received full support for Python with the release of version 10. With many of the geoprocessing tools now available as a Python function, the software can be used for physics-based spatial landslide hazard analysis. A model that mimics PISA-m and its processing of normally distributed soil properties was created using the Python utility as a tool …

Analysis Of Data From A Study To Identify Potential Biomarkers To Indicate Renal Injury, Mitchell D. Tahtinen

Dissertations, Master's Theses and Master's Reports

Ureteropelvic junction obstruction is a disease in which flow from the kidney to the bladder is obstructed for extended periods of time causing irreversible damage to the kidney. Current tests to detect kidney damage caused by obstruction are not effective until significant damage occurs. The purpose of this report is to identify a panel of biomarkers in urine to detect kidney damage earlier by analyzing data collected from a two-part study. Currently, two established urinary biomarkers to indicate kidney damage are NGAL and KIM-1. Biomarkers of interest in this study are CD13, CD10, and CD26. Results from the linear mixed …

Wetland Policy Design In The Upper Great Lakes States: Cases Of Policy Success And Failure, Miranda N. Smith

Dissertations, Master's Theses and Master's Reports

The national goal of “no net loss” of wetlands in the United States has significantly lowered the rate of wetland loss, but wetlands are still being impacted in some areas. Many states have their own policies in place to protect wetlands aside from the main federal policy, Section 404 of the Clean Water Act, and those policies are implemented in different ways by different levels of government. This research focuses on wetland policy in the Upper Great Lakes states comparing Michigan, Minnesota, and Wisconsin. Wetland policy and implementation practices vary from state to state, with wetland approval being more devolved …

Rock Magnetic Investigation Of The Michigan Basin Soils And Sediments Overlying The Oil-Bearing Silurian Pinnacle Reefs, Jake Tresnak

Dissertations, Master's Theses and Master's Reports

A relationship between the hydrocarbon migration and magnetic properties of near-surface sediments was investigated from several hundreds of samples collected over the hydrocarbon-bearing Silurian pinnacle reef belt of the Michigan Basin. The collected samples were investigated using several rock magnetic methods and optical microscopy. The investigation has not revealed a straightforward relationship between the magnetic susceptibility and hydrocarbon reservoirs within the reef belt; both anomalously high and low susceptibility values were observed. The elevated values are associated with newly formed magnetite in the form of spheroidal grains produced by hydrocarbon-related diagenesis while the extremely low susceptibilities may reflect dissolution of …

The Visual And Performing Arts In The Technical Communication Classroom: Reinforcing The University's Internal Community Literacy Via Service-Learning, Richard L. Ward

Dissertations, Master's Theses and Master's Reports

This report details a class taught that was an exploration into the value of STEAM or science, technology, engineering, arts, and mathematics within the confines of Technical Communication as it applies to the business and industry of theatre. It was an experiment in service learning as it could be tied into the Arts via differing technai, as described by John Wild in “Plato’s Theory of Texnh a Phenomenological Interpretation,” demonstrating a necessity for Arts as they pertain to STEM-centric universities. This report discusses a section of Technical and Professional Communication taught at Michigan technological University that consisted of twenty-five students …

On The Logic, Method And Scientific Diversity Of Technical Systems: An Inquiry Into The Diagnostic Measurement Of Human Skin, Joel Beatty

Dissertations, Master's Theses and Master's Reports

This dissertation explores some of the scientific, technical and cultural history of human skin measurement and diagnostics. Through a significant collection of primary texts and case studies, I track the changing technologies and methods used to measure skin, as well as the scientific and sociotechnical applications. I then map these histories onto some of the diverse understandings of the human body, physics, biology, natural philosophy and language that underpinned the scientific enterprise of skin measurement. The main argument of my thesis demonstrates how these diverse histories of science historically and theoretically inform the succeeding methods and applications for skin measurement …

Efl Education In Mainland China: Word Memorization And Essay Writing Among High School Sophomores, Rehema Clarken

Dissertations, Master's Theses and Master's Reports

This dissertation explores English as a Foreign Language instruction within the context of the contemporary Chinese education system. Basic outlines chart the historical development of EFL studies in the United States and China framing the question of what each community values as important measures of success when assessing language learning. While traditional Chinese methods value strict memorization of vast word lists (背单词, BeiDanCi, BDC) the US educational community stresses essay writing—particularly on standardized tests such as the ACT, SAT, and TOEFL, which are required for university admissions. Therefore, this study investigates the relationship between vocabulary knowledge and writing ability among …

Methane Fluxes And Porewater Dissolved Organic Carbon Dynamics From Different Peatlands Types In The Pastaza-Marañon Basin Of The Peruvian Amazon., Jhon Del Aguila-Pasquel

Dissertations, Master's Theses and Master's Reports

Relevant components of the carbon budget such as methane fluxes and porewater dissolved organic carbon (DOC) are poorly characterized in the Peruvian Pastaza Marañon basin (PMB). PMB is associated with a tropospheric hotspot for methane and therefore it may represent a significant methane source. We aimed to quantify the magnitude of CH₄ fluxes and porewater DOC; and to determine their predictors across different peatland types in the PMB (open peatland, palm swamp, and pole forest). The study was conducted in two peatland sites covering the three main vegetation types in PMB. We collected gas and water samples using chamber-based …

An Investigation Of Historic Landscape Occupation, Transformation, And Interpretation At Windigo, Isle Royale National Park, Marley Chynoweth

Dissertations, Master's Theses and Master's Reports

Windigo Ranger Station, Isle Royale National Park, is an historic landscape that provides a gateway to wilderness at one of America’s least visited national parks. Aspects of isolation have helped preserve Isle Royale’s extensive natural and cultural resources, making it an enticing setting for researchers and outdoor enthusiasts. This thesis combines information gathered from archaeological fieldwork and archival research to construct a narrative of landscape transformation at Windigo, Isle Royale National Park. From historic industrial townsite to contemporary NPS visitor port, this narrative highlights three prominent eras of landscape occupation headlined by the Wendigo Copper Company, Washington Club, and a …

Effects Of Post-Fire Salvage Logging On Compaction, Infiltration, Water Repellency, And Sediment Yield And The Effectiveness Of Subsoiling On Skid Trails, Iskender Demirtas

Dissertations, Master's Theses and Master's Reports

Post-fire salvage logging operations can induce environmental problems. This study assessed the effects of different disturbances from post-fire salvage logging on soil bulk density, water repellency, field saturated hydraulic conductivity (Kfs), ground cover, and sediment yields after the 2013 Rim Fire in California. Hillslope plots were installed in three locations (Sawmill, lower Femmons, and upper Femmons). The plot-scale disturbances were burned and untrafficked (low and high slope controls and logged only with no traffic), or burned and trafficked (few and many pass skid trails). Additional measurements were made in nearby areas that included the plot-scale disturbances as well as feller …