Digital Commons Network^™

Climate And Gypsum Parent Material Shape Biocrust Communities And Moss Ecology In The Chihuahuan And Mojave Deserts, Nicole Pietrasiak, Katelyn G. Gobbie, Brian Jusko, Rebecca E. Drenovsky

Life Sciences Faculty Research

Biological soil crust communities (biocrusts) establishing on gypsum soils have been well-documented for their prolific appearance and rich diversity of lichens and bryophytes. However, studies characterizing gypsum biocrusts have occurred primarily outside of the U.S., most of which lack comparisons to other soil types. We conducted intensive field surveys to evaluate the ground cover and frequency of biocrust functional groups and moss species on gypsum and non-gypsum soils in the U.S. regions with the most extensive gypsum outcrops, the northern Chihuahuan and eastern Mojave Deserts. Study sites were stratified by geomorphology and paired, so that every gypsum site was matched …

Math Education: A Comprehensive Guide To Teaching The Foundations, Claudia Jayne Staruch

Honors College Theses

This thesis investigates the critical need for strong foundational mathematics education for adults. More specifically, for incarcerated individuals who lack basic numeracy skills because of the systematic inequalities that they have faced, the need for a mathematics foundation is even higher. This work emphasizes a non-technological approach to teaching these basics through qualitative analysis, including teaching strategies and practical lessons, while recognizing the various barriers many learners face. This research serves as a guide for educators to use for how to sequence and pace lessons, address certain learning styles, and gain classroom engagement, comprehension, and long-term retention of the materials. …

Recovery Of Black Carbon Concentrations In Burned Forests In Wyoming, Usa, Monica Vanesa Zapata Villegas

Dissertations and Theses

Burned forests that remain standing following fire release light-absorbing particles (LAPs), including black carbon (BC), into winter snowpacks, reducing snow surface albedo and accelerating snowmelt timing for decades postfire. Although the role of LAPs in seasonal snow has been extensively studied, the spatiotemporal variability of LAPs' contributions to snowmelt relative to time-since-fire and burn severity remains unknown. This study aimed to quantify the spatiotemporal variability of forest fire effects on LAPs in snow and associated snow albedo in the Triple Divide region of western Wyoming, headwaters of the Colorado, Columbia, and Missouri rivers. Using geochemical analysis and radiative transfer modeling, …

12.02.2024 Orsp Connect, Liz Williamson

ORED Newsletter

Email Address Matters

All of Us Researcher Symposium

Welcome Anya Goldman

Ge/Sige Quantum Wells: Material For The Post-Moore Era, Troy Alexander Hutchins-Delgado

Optical Science and Engineering ETDs

This dissertation demonstrates high-quality germanium quantum wells on a 200 mm silicon wafer platform, enabling novel device possibilities. Partnering with a commercial silicon-germanium epitaxy supplier, we obtained shallow, undoped germanium quantum wells with high-crystalline quality, confirmed through x-ray diffraction, secondary ion mass spectroscopy, high-resolution scanning transmission electron microscopy, and energy dispersive x-ray spectroscopy. Hall bar devices fabricated on single quantum wells revealed that surface preparation can tune transport properties while maintaining peak mobilities around 10⁵ cm²V⁻¹s⁻¹. Manganese-germanide spintronic contacts were integrated via solid-state reaction, with contact quality assessed through Schottky diodes, transfer length …

Synthesis Of Glycan Antigens For Therapeutic Antibodies And Glycoconjugate Vaccines, Synthesis Of An Inflammatory Pentasaccharide, And Design And Synthesis Of Ceragenins For Use In Medical Devices And Osteomyelitis, Shawn Gubler

Theses and Dissertations

A promising approach in combatting infections from antibiotic resistant bacteria/fungi is using therapeutic monoclonal antibodies (mAbs) that can bind the outer surfaces of microbes. We have developed a synthetic vaccine platform that can rapidly generate mAbs against surface glycans from desired strains, such as lipopolysaccharides and capsular polysaccharides. To create therapeutic antibodies against Ruminococcus gnavus, Burkholderia multivorans, and Staphylococcus aureus, we synthesize glycan antigens from each strain that are necessary for use in our glycoconjugate vaccine platform. Blooms of the Gram-positive bacterium Ruminococcus gnavus have been correlated with inflammatory bowel disease, and recently a polysaccharide produced by this organism was …

Exploring The Accuracy Of Interferometric Quantum Measurements Under Conservation Laws, Nicolò Piccione, Maria Maffei, Andrew N. Jordan, Kater W. Murch, Alexia Auffèves

Mathematics, Physics, and Computer Science Faculty Articles and Research

A (target) quantum system is often measured through observations performed on a second (meter) system to which the target is coupled. In the presence of global conservation laws holding on the joint meter-target system, the Wigner-Araki-Yanase theorem and its generalizations predict a lower bound on the measurement’s error (Ozawa’s bound). While practically negligible for macroscopic meters, it becomes relevant for microscopic ones. Here, we propose a simple interferometric setup, arguably within reach of present technology, in which a flying particle (a microscopic quantum meter) is used to measure a qubit by interacting with it in one arm of the interferometer. …

Closed Domain Question Answering With Language Models: Application Of Retrieval-Augmented Generation And Parameter Efficient Fine-Tuning In Healthcare, Aaron Cummings

Master's Theses

Dementia care presents significant challenges for informal caregivers, particularly in managing behavioral symptoms that affect over 90% of individuals with Alzheimer’s Disease and Related Dementias (ADRD) during the moderate-to-severe stages. These symptoms, including agitation, wandering, and repetitive activities, impose emotional and physical burdens on caregivers, often exacerbated by a lack of reliable, accessible, and personalized resources. Non-pharmacological interventions, while evidence-based, are underutilized due to knowledge gaps and the inefficiency of traditional training and information retrieval methods.

This research explores the adaptation of large language models (LLMs) to address these challenges by developing a framework for closed-domain Question Answering (QA) systems, …

Gpu Exploration Using Pycuda, Prudhvi Sai Akulapally

Masters Projects

This project investigates the implementation and optimization of parallel computing techniques using GPU acceleration frameworks such PyCuda. With the increasing demand for high-performance solutions in data-intensive applications, GPUs offer a compelling alternative to traditional CPU-based processing. The primary objective of this work is to harness the computational power of GPUs to achieve significant performance enhancements for complex workloads. The study focuses on two essential research questions: How effectively can PyCuda accelerate computational tasks, and what measurable performance gains can be achieved compared to CPU-based implementations? By addressing these questions, this project explores the applicability of GPU programming in tasks such …

Disrupting The Status Quo: Narratives Of Women Of Color Leaders At California Community Colleges, Lesley Doricely Meza

LMU Theses and Dissertations

The California Community College (CCC) system is the largest higher education system in the United States and serves diverse students. However, CCC’s leadership does not mirror the diversity of its student population. Senior-level positions continue to be dominated by White men, highlighting the lack of diversity among leadership at these institutions and exposing the ongoing underrepresentation of women, especially women of color (WOC), in leadership positions due to the ingrained hierarchal and patriarchal systems in CCCs. This qualitative study aimed to provide a deeper understanding of the lived experiences of WOC, who are midlevel administrators at the CCC system. A …

Predictive Modeling And Sustainability Assessment Of Hydrothermal Liquefaction Of Seaweeds: A Techno-Economic And Life Cycle Analysis Approach, Micheal O. Asama

Mechanical Engineering Theses

This study presents comprehensive predictive models and an economic and environmental assessment of HTL for converting macroalgae into biofuels and valuable co-products. Predictive models were developed based on experimental kinetic data to simulate batch HTL of brown seaweed, capturing the yields of biocrude, gas, biochar, and water-soluble compounds as functions of key process variables, including temperature, time, pressure, and water-to-biomass ratio. Analysis of Variance (ANOVA) confirmed that temperature and residence time significantly affect biocrude yield, with an optimal yield of 23% achieved at 283°C, 200 bar, 54 minutes, and a 10:1 water-to-biomass ratio. The model’s predictive accuracy was validated with …

Special Education Teachers’ Perceptions Regarding The Inclusion Of Students With Learning Disabilities In Assistive Technology, George Edward Avent

Walden Dissertations and Doctoral Studies

Special education teachers do not always include assistive technology (AT) in instructional practices to promote the academic success of students with learning disabilities. The purpose of this study was to explore the reasons special education teachers only sometimes include the use of AT in instructional practices. The conceptual framework was observational learning theory, also known as social learning theory, which focuses on human learning patterns based on observations of other human beings. A basic qualitative design with open-ended, semistructured interviews was used. The participants included 12 special education teachers from the school study site. The research questions framed the study’s …

Kenyon Collegian - December 12, 2024

The Kenyon Collegian

No abstract provided.

The Uniform Triadic Transformation And Claude Debussy’S Music, Davielle Smith

Honors Theses

Beginning with Claude Debussy’s Berceuse Héroïque, I analyzed each triad using chord symbols along with their Roman numeral representation (where applicable).1 Next, I used integer notation and modular arithmetic, where each pitch name is given a number such that C is 0 and B is 11, creating a set, the integers (mod 12).

This leads to the development of pitch-class sets where the “mode” of a triad or arbitrary number of pitches is expressed in terms of interval spacings. In many cases, such as that of 12-tone or other serialized music, pitch class sets explain many of the composer’s artistic …

Design, Synthesis, And Nmr-Guided Characterization Of A Targeted Covalent Inhibitor-Like Molecule Against Ivyp1 From P. Aeruginosa, Samuel Taylor Moore

Master's Theses

Multi-drug resistance poses a serious threat to future generations and historical antibiotic pipelines; consequently, the medical and economic burdens associated with treating multidrug-resistant bacteria are substantiated. In this context, P. aeruginosa (PA) emerges as one of the most significant healthcare challenges, being a leading cause of resistance-associated mortality worldwide. Despite modern efforts to combat these poor outcomes, drug-resistant cases continue to rise, and the need for novel antibiotic treatment is apparent. To this end, we investigated relevant resistance mechanisms and past antibiotic targets within PA, and in doing so, we identified relationships between peptidoglycan biology and a periplasmic protein, Inhibitor …

More Than Just A Grade: Factors Influencing Secondary Students’ Engagement With Digital Feedback, Mandy Prior

Dissertations

The increasing use of technology in secondary education has shifted teacher feedback practices to digital environments. While digital feedback offers many promising affordances, the factors that influence how students engage with and use digital feedback are not well understood. Previous research indicates that digital feedback poses unique challenges for engagement. New paradigm feedback models seek to identify processes and actions that promote feedback engagement. However, these models require further study in digital and pre-higher education contexts. This qualitative single-case study investigated the factors influencing secondary students' engagement with digital feedback. Data included 24 student interviews conducted across four grade levels …

School Principals’ Perception On Their Job Satisfaction, Arti Narayan

Walden Dissertations and Doctoral Studies

The school principal’s roles have become quite complex and strenuous causing an impact on school principals’ job satisfaction. The problem that was addressed through this basic qualitative study was the low job satisfaction of school principals at a school district in California. The framework used for the study was the job demands and resource theory. The purpose of this research study was to examine the perceptions of TK-12 school principals regarding their job satisfaction based on the job demands and resource framework. Using a basic qualitative research design, data were gathered through semistructured interviews with nine school principals out of …

Sel For Well-Being And Equity In Higher Education, Colleen Conley, Deborah Donahue-Keegan

Psychology: Faculty Publications and Other Works

The understood overarching purpose of higher education is to prepare students, typically young adults, with the knowledge and skills needed to navigate, thrive in, and be contributing members of society (Hurtado, 2019). In this time of unprecedented cross-sectoral complexity and volatility on a global scale, institutions of higher education must consider a more expansive set of learning and competency outcomes (Gopalan et al., 2022). This paradigm shift is essential given the alarming rise in mental health challenges on college and university campuses, deep polarization, and an increased demand for prosocial skills in workplaces across sectors (Dermody et al., 2022; Padurean …

A Survey Of Several Python Libraries Foe Computational Geometry, Meghana Kolluru

Masters Projects

This project delves into computational geometry, a crucial area of computer science, by

implementing algorithms to solve geometric problems using Python libraries like Shapely, SciPy,

and Triangle. It begins with foundational tasks such as creating geometric objects (points, lines,

polygons) and performing operations like calculating distances, intersections, and unions. These

basics lay the groundwork for tackling more advanced applications.

Key implementations include the Convex Hull, which computes the smallest convex

polygon enclosing a set of points, aiding in applications like collision detection and GIS. The

project also explores Voronoi Diagrams, which partition a plane into regions based on proximity,

and …

Analysis Of The Snake Cube Puzzle And Adjacency Criteria, Trey Matus

Honors Theses

The snake cube is a puzzle that consists of straight and turn pieces attached by a string that folds into a n x n x n cube. Finding solutions for large cubes is difficult, so finding necessary conditions for solutions is crucial. Using computational algorithms and mathematical proofs, I find improved bounds for the maximum number of straight pieces in a given puzzle size. In particular, I introduce and apply the adjacency criterion to identify groups of puzzles that are unsolvable. Additionally, I find a connection between the number of puzzles that adhere to the adjacency criterion and generalized Fibonacci …

Real-Time Feedback-Driven Framework For Automated Cybersickness Mitigation, Md Jahirul Islam

Master's Theses

As technologies are becoming more advanced day by day, the embracement of virtual reality (VR) technology among users is also increasing in daily activities for various purposes, and subsequently, the barrier between the real and virtual world is fading. Despite the versatile uses, cybersickness (CS) is a major problem which is induced among users due to the immersive VR experience. There is a plethora of research findings and methods to measure the users’ CS such as virtual reality sickness questionnaire (VRSQ), simulator sickness questionnaire (SSQ), fast motion scale questionnaire (FMS), and others. Recently, machine learning approaches have also been adopted …

Data Intensive Method For Processing Defect Detection And Mitigation For Composites, Deepak Kumar

Doctoral Dissertations and Master's Theses

Composite manufacturing without processing defects is a crucial step in satisfying the production, performance, and quality requirements of composite materials in various industries. Autoclave processing enables manufacturing of high-quality composite parts with excellent mechanical properties, whereas additive manufacturing (AM) offers adaptability to complex designs and streamlined processes. However, each method presents unique challenges; despite the benefits, autoclave processes can still result in processing defects, and AM is particularly susceptible to processing anomalies owing to the novelty of the process. Ensuring the quality and reliability of composite manufacturing is essential to fully capitalize on the advantages offered by both techniques. Artificial …

Sulfhydryl-Containing Compounds And Iron Homeostasis: Mechanisms Of Labile Iron Pool Dysregulation And Consequences For Cellular Health, Steven Lowell Mann Christiansen

Theses and Dissertations

While iron's unique coordination chemistry and redox activity have resulted in its broad incorporation into biological systems, dysfunction in key iron-regulating mechanisms can transform these biochemical advantages into factors that contribute to several pathological conditions. This dissertation explores the complex interactions between iron and sulfhydryl-containing compounds (SCCs), with particular focus on glutathione's (GSH) role in stabilizing iron reactivity juxtaposed with homocysteine's (Hcy) ability to disrupt iron homeostasis and promote disease progression. Through rigorous biochemical analysis and experimentation, we demonstrate that Hcy disrupts iron regulation through several mechanisms: (1) Hcy competitively displaces protective iron-binding molecules in the Labile Iron Pool (LIP), …

Acquisition Of English By Additional Language Learners In Inquiry-Based Classrooms Within International Baccalaureate Primary Years Program Schools, Valerian Goguadze

Dissertations

Many International Baccalaureate (IB) Primary Years Programme (PYP) schools provide English instruction to all students. The program has grown worldwide with a significant enrollment of students who speak a first language other than English, necessitating the need for an English as an Additional Language (EAL) curriculum. The IB’s philosophy of language acquisition is deeply integrated into its documents, school policies, and classroom practices. Consequently, all IB teachers, not just those who teach additional languages, are expected to have a basic understanding of how to teach English. Despite IB’s supportive-inclusive policies, EAL learners continue to face challenges in learning English.

There …

Silver Bow Creek Butte Area Npl Site Spring Semi-Annual 2024 Butte Priority Soils Operable Unit Interim Site-Wide Groundwater Monitoring Data Report. Consent Decree- Civil Action No. Cv 89-039-Bu-She, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Comment Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Blacktail Creek Groundwater Hydraulic Control System Pre-Design Investigation Evaluation Report (Dated September 16, 2024), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Silver Bow Creek Butte Area Npl Site 3rd Quarter 2024 Butte Priority Soils Operable Unit Interim Site-Wide Surface Water Monitoring Data Report. Consent Decree- Civil Action No. Cv 89- 039-Bu-She, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Silver Bow Creek Butte Area Npl Site 3rd Quarter 2024 Butte Priority Soils Operable Unit Interim Site-Wide Surface Water Monitoring Data Report. Consent Decree- Civil Action No. Cv 89- 039-Bu-She, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Elucidating The Role Of Astrocytes In Norepinephrine Neuromodulation, Katheryn Bry Lefton

Arts & Sciences Graduate Student Theses and Dissertations

Norepinephrine, a wakefulness-associated neuromodulator, profoundly reshapes neural systems, from synaptic circuits to behavior. Through decades of research, a substantial catalogue on the effects of noradrenergic signaling on behavior and networks has been generated. How norepinephrine remodels synaptic circuitry is widely thought to underlie the larger changes in neural networks and behavior, highlighting the need for a more thorough understanding of the circuit effects of norepinephrine neuromodulation. However, the mechanistic details of the norepinephrine on synapses are still unclear. In recent decades, a large body of work has shown that norepinephrine acts not just on neurons, but on glial cells including …

Repeat Photography Monitoring Made Easy, G. Allen Rasmussen, Kathy Voth, Eric Thacker, Randall Violett, Ruger Carter, Dallen Smith

All Current Publications

Professional land managers use monitoring as the basis for evaluating and making management decisions. There are many monitoring techniques. Here, we will discuss one of the simplest, cheapest, and quickest methods: repeat photography. By following the easy steps outlined here, range users will collect data and record interpretations over time to provide proof of change and management efforts.