Physical Sciences and Mathematics Commons^™

The Sustainability Rhetoric Among The Spanish Fashion Companies Involved In The Rana Plaza Collapse Of 2013, Keegan Lyle

Honors Theses

Over the last century, fashion has evolved to become a commodity that is rapidly changing and easily available. The processes that have led to this accessibility of fashion, however, have proven to be harmful to the environment and, most recently, proven to be potentially fatal for the people making the clothing. In 2013, a garment factory in Bangladesh, housing production for major global fashion brands, like Zara and The Children’s Place, collapsed following a series of negligence. The event has sparked years of awareness-raising in the public dialogue of fast fashion. As a part of the newly-developing research in sustainable …

Increasing Perceived Realism Of Objects In A Mixed Reality Environment Using 'Diminished Virtual Reality', Logan Scott Parker

Honors Theses

With the recent explosion of popularity of virtual and mixed reality, an important question has arisen: “Is there a way to create a better blend of real and virtual worlds in a mixed reality experience?” This research attempts to determine whether a visual filter can be created and applied to virtual objects to better convince the brain into interpreting a composite of virtual and real views as one seamless view. The method devised in this thesis is being called 'Diminished Virtual Reality'. The results found in this study show that when presented with a scene composed of a combination of …

C-H On The Oxo Ferryl Wheel: Comparison Of Pyridine And Imidazole-Substituted Ligands For C-H Activation And Functionalization, Elizabeth Milem

Electronic Theses and Dissertations

The selective and efficient transformation of hydrocarbon feedstocks is of high value for industry and research. While Shilov-type organometallic methods have facilitated this goal, systems designed after nature’s use of cheap and abundant iron-based enzymes are desired for wider-scale applications. This work establishes hydrocarbon oxidation efficiency of synthetic pyridine-based ligands (BPMEN, BPMPN) compared to commercially available TPA with in situ generated catalysts. Literature studies of traditionally synthesized BPMEN systems and initial in situ studies offered evidence for enhanced reactivity (TON) as compared to TPA. Expansion to a propyl backbone to produce BPMPN tested the increased chelate ring size’s impact on …

Building An Artificial Intelligence Framework For Hypertension Diagnosis: A Use Case Of The Problem List Curation, Ketemwabi Yves Shamavu

Theses & Dissertations

Hypertension is the world's leading factor in cardiovascular disease. Forty-seven percent or close to one in two Americans aged 18 and older are affected. It predicts approximately a thousand deaths per day. Based on recent statistics from the Centers for Disease Control and Prevention, one in three patients with hypertension does not know they are hypertensive. Seventy-five percent of hypertensive patients have uncontrolled hypertension - meaning that they are not treated to target. While there is extensive literature on hypertension diagnosis and management, there is an apparent gap in understanding and acknowledging that a person is hypertensive. Moreover, blood pressure …

Nitro-Aromatic Polymers For Conversion-Style Battery Cathodic Materials, Brady P. Samuelson

Honors Thesis

The development of organic electrode materials in rechargeable batteries has seen a resurgence in recent decades. This spike in interest is mostly due to the increased investments in renewable energy sources, grid-scale energy storage, and the rapid transition to electric vehicles. Current lithium battery cathode materials typically use some form of lithium metal oxide (specific capacity: 272 mAh g^-1 which has problems with limited capacity, thermal runaway, and an unreliable supply chain. Our research group’s solution involves investigating new lightweight, organic redox groups combined with a conductive polymer backbone to serve as a possible replacement for the cathode in …

Trophish: Building A Global Database Of Freshwater Trophic Interactions, Jacob M. Ridgway

Honors Thesis

Freshwater management and research frequently use the trophic data of freshwater fishes. Despite this fact, it is difficult to perform a simple search of dietary information for any one fish species. FishBase represents, to our knowledge, the largest compilation of freshwater dietary information to date. However, it excludes a large portion of the ecological literature due to its development taking place prior to the creation of most modern scientific search engines. Our project (TroPhish) is building upon FishBase by digitizing approximately 130 years of data from the fish predation literature. Data from the primary and grey (e.g. theses, dissertations, reports) …

The Impact Of Virtual Learning Modalities On The Academic Success Of Students In One Arkansas School District, Diane F. Richards

ATU Theses and Dissertations 2021 - Present

The COVID-19 pandemic changed the way Arkansas public schools’ offered students an education. While moving through this pandemic, many Arkansas schools implemented optional methods of delivery for their students. Some schools tried to maintain face-to-face classes, while others offered completely online classes. Still, others offered a hybrid format where students attended some face-to-face classes and online classes. One Arkansas school district offered all three options. School districts need guidance as to which teaching methods worked well. The long-term effects of the educational impact of COVID-19 are not known at this time. Schools could benefit from a guide with useful strategies …

Teacher Preference In Professional Development, Cheri L. Keyes

ATU Theses and Dissertations 2021 - Present

Teacher Preference in Professional Development

Teacher professional development (PD) is seen as best ways to ensure teacher quality and guarantee positive student achievement outcomes; however, there is a lack of appropriate and effective PD. This quantitative study examined teachers’ preferences in PD content and delivery. Teachers from a K-12 public school district in Northwest Arkansas were invited to participate in a cross-sectional survey, and 292 teachers responded. The measured variables were the professional development preferences of the teachers, the teachers' years of experience, the grade level at which teachers teach, gender, the content of preferred PD, and the delivery or …

Read This: A Content Analysis Framework For Book Recommendation Applications, Cypress S. Payne

Honors Projects

Book recommendation applications combine word-of-mouth recommendations with algorithms that can suggest books based on a user’s account activity, creating a robust system for finding new books to read. Current research on recommendation systems is purely quantitative, focusing on the efficacy of the system, and content analyses are only just beginning to be performed on mobile applications. I use previous content analyses on applications as a basis for creating a content analysis framework for book recommendation applications. This framework can be used to analyze what users find important in book recommendation apps and inform app creators about their users’ wants and …

An Application Of Differential Mathematical Modeling Techniques To Study The Ongoing Rabies Epizootic In China, Christopher Turner

Electronic Theses and Dissertations

Rabies remains a global public health issue with a wide variety of neurological symptoms such as confusion, slight paralysis, hypersalivation, and hydrophobia. Rabies is usually fatal once symptoms appear. Many species are reservoirs for rabies, such as foxes, racoons, and wild dogs, which in turn can transmit the disease to humans, leading to complex transmission chains. There is a long latent period of rabies, between 1 to 3 months after infection, which further complicates control efforts. Mathematical modeling is a valuable tool in the study of infectious disease outbreaks and there have been many models applied to rabies outbreaks. However, …

Overlapping Scales Of Place Based Indigenous Knowledge And Hydroclimate In Australia, Rachel L. Coleman

Electronic Theses and Dissertations

Indigenous Peoples have been monitoring and adapting to uncertainty and change in their local regions for millennia, resulting in a holistic view of the interlinkages within the occupied complex socio-environmental systems. This research consists of investigating the overlapping scales of knowledge within Indigenous Australian seasonal calendars and colonial methods of hydroclimate assessment for improving adaptability to climate change impacts.

The analyses began with a sample of 25 Indigenous seasonal calendars providing a glimpse into interlinkages among biota, environment, and meteorology of the localised regions. Across the calendars, five themes of information and multiple categories within these themes became apparent and …

Computational Analysis Of A Mn-Based Electrocatalyst With Primary Amine Substituents In The Secondary Coordination Sphere For Co2 Reduction, Erin Urban

Undergraduate Honors Theses

The purpose of this research was to report the mechanism for the two-electron, two-proton conversion of CO 2 to CO and H 2 O using a manganese(I) electrocatalyst, Mn(L)(CO) 3 Br (where L = bipyridyl ligand with aryl-amine moieties installed at the 6 position of 2,2’-bipyridine), synthesized by the Jurss group, including any other competing reactions, such as the hydrogen evolution reaction (HER). The “protonation- first” and “reduction-first” pathways were considered for CO 2 RR. Density functional theory (DFT) calculations were performed to determine the redox potentials and Gibb’s free energies for each step in the mechanism for CO 2 …

Giving Form To Flow: Modeling The Paleohydrological Context For Human Settlement And Water Use In The North-Central Coast Of Peru, Elizabeth Leclerc

Electronic Theses and Dissertations

Within coastal Andean archaeology there is a growing emphasis on the roles of hydrology and hydrological knowledge in Andean strategies for water management, settlement, and land use. Hydrological methods can not only help reconstruct past water environments but also illuminate the influence of changing climates and conditions in the Andean highlands on coastal water flows. Through a case study of the Supe River basin in north-central coastal Peru, focusing on the period from 5000 to 3000 calibrated radiocarbon years before present (cal. BP), I review several hydrological methods useful for archaeological study. I then combine these to develop a paleohydrological …

Fabrication Of Particulates For Detecting Trace Level Analytes In Water Using Optical Spectroscopy And For Developing Thermoelectric Materials, Mohammed Nayeem Ibnul

Electronic Theses and Dissertations

The underlying concepts developed in this thesis involve particulate fabrication of known size using a bottom-up synthesis or a top-down milling process. This bottom-up approach was used for detection of analytes in water. Conventional UV-Vis spectroscopic based detection methods require target analytes to be soluble or have enough vapor pressure for analysis in the gas phase. We achieved an order in magnitude improvement in the detection limit over the standard molybdenum blue method for phosphate and arsenate by conversion of target analytes present in solution to a solid for quantification by UV-Vis and IR spectroscopy. Furthermore, by recording a visible …

Measuring & Planning For Community & Climate Resilience, Joseph Reed

Electronic Theses and Dissertations

How communities respond to shocks has been of large interest to academics and governance since Hurricane Katrina in 2005, the Great Recession in 2008, and very recently the COVID-19 pandemic. The likelihood and extent of these shocks are ever increasing with the threat of climate change, leading to increased pressure on communities to understand and prepare for future shocks. Urban communities are often better prepared to strengthen their resilience due to the vast amount of resources they have available. Smaller, more rural communities typically have fewer resources to strengthen their resilience, making it harder to prepare for future shocks. This …

Enhanced Condition Assessment For Maine Lakes, Jeremy Deeds

Electronic Theses and Dissertations

The Influence of anthropogenic activities on lake water quality is well documented, but how those influences interact with the effects of natural features, such as watershed geology or lake morphometry, has been less explored. Further, some aspects of lake condition are influenced by factors that are not lake or watershed specific, but occur across large regions, such as weather patterns. All these factors may be interrelated in some instances, which can complicate lake condition assessments which have the purpose of determining how lakes are being affected by human activities. This dissertation investigates how lake assessments can integrate the interactions among …

Jlootbox: An Agent-Based Model Of Social Influence And Gambling In Online Video Games, Lila Zayed

Honors Capstones

Loot boxes are digital treasure chests that players spend real money to purchase, wherein the contents are randomly generated. Since players spend money on the pretense they might receive something valuable, many comparisons have been drawn to gambling behavior as the reward is up to chance. To explore this phenomenon, agent-based modeling will be used to simulate this behavior. Agent-based modeling allows us to create heterogenous agents who follow simple rules so that we may observe emergent behavior in a population. An agent-based model was created using Repast Simphony for this end.

Parameters included the player’s internal decision strategy around …

Evaluating Physical And Cultural Methods To Improve Weed Management In Organic Vegetables, Rebecca J. Champagne

Electronic Theses and Dissertations

Effectively managing weeds in organic vegetable production continues to be challenging and costly. Cultivation, often referred to as physical weed control (PWC), is foundational for organic farmers; however, efficacy tends to be low and highly variable. Additionally, some crops are slow to germinate, and thus have poor competitive ability against weeds and high mortality from cultivation. This can result in high costs for hand-weeding labor, abundant seed rain into the soil, and a recurring, often increasing, weed problem. These challenges may be addressed by “stacking” tools to increase weed control efficacy, integrating targeted seedbank management strategies to reduce the germinable …

Sustainability Conversations For Impact: Transdisciplinarity On Four Scales, Katrina Brewster Pugh

Electronic Theses and Dissertations

Sustainability is a dynamic, multi-scale endeavor. Coherence can be lost between scales – from project teams, to organizations, to networks, and, most importantly, down to conversations. Sustainability researchers have embraced transdisciplinarity, as it is grounded in science, shared language, broad participation, and respect for difference. Yet, transdisciplinarity at these four scales is not well-defined. In this dissertation I extend transdisciplinarity out from the project to networks and organizations, and down into conversation, adding novel lenses and quantitative approaches. In Chapter 2, I propose transdisciplinarity incorporate academic disciplines which help cross scales: Organizational Learning, Knowledge Management, Applied Cooperation, and Data Science. …

Development Of Methods For Surface Modification Of Semiconductor Photocatalysts And Biopolymers For Applications In Water Treatment And 3d Printing, Sabrina Sultana

Electronic Theses and Dissertations

Surface modifications of metal oxides and polymer substrates are widely adopted approaches to alter the properties of these materials for use with specific applications. In the first part of my thesis, I describe how we have modified the surface of magnetic particles (Fe3O4) with layers of SiO2 and TiO2 to generate photocatalysts that remove toxic chemicals from drinking water. Semiconductor photocatalysts, such as TiO2 have gained much interest over the last 20 years as promising materials for water treatment. However, a main drawback centers on the difficulty to remove the catalyst from the water which has made it very difficult …

Feed-In Tariffs And Sustainable Energy: Why Different Oecd Governments Support Sustainable Energy At Different Rates Through Feed-In Tariffs, Joshua M. Grahame

Business and Economics Honors Papers

Why is it that different governments in the OECD support sustainable energy at different rates? In the effort to explain this difference, Feed-in-Tariffs (FITs) will be closely examined to see if it can explain the significant portion of the variation among countries. This project serves as a continuation of previous scholars' works, to better understand the variation between countries in adopting renewable energy, even though all members of the OECD have pledged that by 2030 half of their energy will come from sustainable energy. Whereas previous research considered data ending in 2012 and looked at countries outside of the OECD, …

Analysis Of The Light Responsive Azobenzene Peptide Nucleic Acid Duplexes, Kat Nguyen

Honors College Theses

Peptide nucleic acids (PNAs) are oligonucleotide analogues in which the sugar-phosphate backbone has been replaced by a pseudopeptide skeleton. Since PNAs use the natural nucleobases (Adenine, Thymine, Cytosine, Uracil, and Guanine) found in either DNA and/or RNA, they are able to hybridize according to Watson-Crick base-pairing to form duplexes. PNA is a promising therapeutic agent because they can function as antigene or antisense chemical agents. To further enhance their utility, we aim to incorporate a photoswitchable moiety using azobenzene. Here, we report the results of the synthesis and purification of a photoswitchable 11 mer PNA along with initial characterization efforts.

Ligers Interferometric Survey Of M Dwarf Diameters, Tyler Gregory Ellis

LSU Doctoral Dissertations

In this dissertation, I present the largest single collection of M dwarf stellar radii in over a decade and contextualize these measurements with the systematic model discrepancies. The measurements of stellar angular diameters are also important in the quantification of the properties of exoplanets. In order to estimate the property of the exoplanet, it is first necessary to quantify the properties of the planet's host star. Using the survey results complemented with previous direct observations of the angular diameters of low mass stars, I develop updated updated surface brightness relationships. These relationships allow predictions of angular diameters using easy to …

Age, Growth, Foraging, And Trophic Ecology Of Bigeye (Thunnus Obesus) And Yellowfin (Thunnus Albacares) Tuna In Continental Shelf And Slope Regions Of The Northeast U.S., Riley S. Austin

Electronic Theses and Dissertations

Traditional stock assessments require, in part, accurate knowledge of growth relationships to estimate a variety of aspects involved in population conservation management of exploited species. In addition, the local distribution and condition of top pelagic predators is driven by detection of abundant forage aggregations and along with traditional stock assessments, should be considered for effective management of marine populations. Empirical analyses of these data are severely lacking for bigeye (Thunnus obesus) and yellowfin (Thunnus albacares) tuna in the Atlantic Ocean, especially for the former. Given historical studies’ observations of these two top predators use as biological samplers due to their …

Development And Evaluation Of Modeling Approaches For Extrusion-Based Additive Manufacturing Of Thermoplastics, Christopher C. Bock

Electronic Theses and Dissertations

This work focuses on evaluating different modeling approaches and model parameters for thermoplastic AM, with the goal of informing more efficient and effective modeling approaches. First, different modeling approaches were tested and compared to experiments. From this it was found that all three of the modeling approaches provide comparable results and provide similar results to experiments. Then one of the modeling approaches was tested on large scale geometries, and it was found that the model results matched experiments closely. Then the effect of different material properties was evaluated, this was done by performing a fractional factorial design of experiments where …

Building Monitoring And Response Capacity For Ocean And Coastal Acidification In The Northeast United States, Parker Gassett

Electronic Theses and Dissertations

Ocean and coastal acidification (OCA) present a unique set of sustainability challenges at the human-ecological interface, and the waters and communities of the Gulf of Maine are among the most vulnerable to this environmental threat. Successful adaptation and mitigation options to address myriad impacts of OCA– including actions by marine resource and water quality managers, the scientific community, and the aquaculture and fishing industry – depend strongly on the availability of monitoring that can inform decision-making and on developing and implementing best practices for resilience at the community level. Collaboration between technical experts, facilitators, and a locally engaged citizenry can …

The Category Of Modules Over A Leavitt Path Algebra, Davis Macdonald

Electronic Theses and Dissertations

In this thesis we establish the technique used to construct universal algebras, and apply this technique to construct Leavitt path algebras. We then establish the basic language of category theory. From there we look at the category of modules over Leavitt Path Algebras over a finite graph, and establish a functorial classification of this category.

Structure From Motion Methodology Captures Seasonal Influences On Coastal Bluff Erosion And Landslide Hazards In Casco Bay, Me, Nicholas Whiteman

Electronic Theses and Dissertations

Shoreline erosion in response to rising sea level is a global problem. Recognizing the need for observational data on coastal bluff recession in Casco Bay, Maine, we employed Structure from Motion (SfM) photogrammetric methods in a dynamic intertidal environment. Evaluating the method as a means to measure and monitor dynamic geomorphological changes occurring at a coastal bluff shows that a spatial resolution of centimeters over an area of 10’s to 100’s of meters can be attained at relatively low cost. The efficient methodology allows for frequent surveys at an operational scale, leading to greater temporal resolution and quantification of bluff …

Impact Of Community Radio On Community Development In The United States, Jillian Hermansky

Capstone Collection

Community radio is a community-led broadcasting service that serves as a tool for development for communities around the world. This research study explores the development benefits of community radio in the United States using a case study of Federal Communications Commission (FCC)-licensed FM community radio stations to evaluate the role of community radio in communication and information sharing and promoting sustainable social change and development. To fulfill the objectives of the case study, data was collected from 55 community radio stations in the United States using mixed-questionnaire digital surveys and supplementary virtual interviews. Findings indicated that community radio stations in …

Pluto In Hand: Design And Implementation Of A Location-Based Mobile Augmented Reality Application For Viewing Open Data, Matthew O. Ward

Theses and Dissertations

Immersive mobile augmented reality (AR) technology has improved while geolocational data volume has grown. City governments can utilize this technology to share their geospatial data with the public, promoting smart city aims. This research describes the design and implementation of a novel open-source ARGIS application to view property tax lot information in New York City. This proof-of-technology demonstrates web-based AR can visualize location-based spatial data.