Digital Commons Network^™

Modeling Copper Biogeochemistry In Continental Environments: 0 – 93 °C, Paul Goldsborough Helfrich

Graduate Theses & Non-Theses

Microbiomes are intertwined with copper chemistry through both toxin and trace nutrient interactions. We produced and examined nineteen metagenomes from a creek recovering from historic copper mining to investigate how anthropogenic contamination shapes microbial community structure and functional potential. We then incorporated the metagenomic profiles and concurrently collected geochemical context into multivariate models to examine correlations between habitat geochemistry and microbial ecology. Residual copper and wastewater inputs alter stream habitability across seasonal gradients. We complimented initial analyses with new insights from high temperature environments. Combined dissolved inorganic carbon (DIC), temperature, pH, and silica stress constrain photosynthesis in hydrothermal features. Geochemical …

Strategies For Early Learners, Second Edition, D.R. Meece

Open Textbooks

Welcome to learning about how to effectively plan curriculum for young children. This textbook will address: Developing curriculum through the planning cycle Theories that inform what we know about how children learn and the best ways for teachers to support learning The three components of developmentally appropriate practice Importance and value of play and intentional teaching Different models of curriculum Process of lesson planning (documenting planned experiences for children) Physical, temporal, and social environments that set the stage for children’s learning Appropriate guidance techniques to support children’s behaviors as the self-regulation abilities mature. Planning for preschool-aged children in specific domains …

Adaptive Quantum Gradient Descent For Training Novel Quantum Neural Network Classifiers, Irene Kahvazadeh

Waldo Library Student Exhibits

No abstract provided.

The Impact School Leaders Have On Special Education Teacher Retention: A Cross-Case Analysis Of Two Elementary School Leaders, Nancy S. Bowers

All Dissertations

School leaders shape school culture and job satisfaction, impacting teachers’ decisions to remain or exit schools. The demand for special education teachers has continued to increase. I studied the impact school leaders have on increasing special education teacher retention by answering the following research question: How can school leaders increase the retention rates of special education teachers? This qualitative case study was guided by two theoretical frameworks, transformational leadership theory and critical disability theory, which informed the research design. I conducted the research at two public elementary schools in a suburban community in South Carolina. The findings revealed school leaders …

Patterns And Continuity: Documenting African American History In Carbon County, Utah, And The Roots Of Racial Terror Lynchings In American Society, Michael L. B. Forvil

Undergraduate Honors Theses

This thesis explores the history of African Americans in Carbon County, Utah, through the lens of racial terror lynching, community memory, and migration. Anchored in the story of Robert Marshall, a Black man lynched in Price, Utah, in 1925, the project considers how racial violence reached beyond the American South and how such acts have been neglected in public memory. Drawing on family history research, census records, historical newspapers, and the work of the Equal Justice Initiative (EJI), this work contextualizes Marshall’s death within broader patterns of racial terror lynchings that shaped African American migration from the South during the …

Mapping Sedimentary And Crustal Thicknesses In The Northern Atlantic Ocean From Public Domain Geophysical Data, Hermione Lofton

College of Arts and Sciences: Undergraduate Theses and Other Student Projects

The Northern Atlantic Ocean is a complex region that contains many inactive and active tectonic features. These features include the Jan Mayen Microcontinent, Jan Mayen Fracture Zone, Aegir Ridge, Kolbeinsey Ridge, the Greenland-Iceland-Faroe Ridge, the Voring Plateau, the Voring Spur, and the Iceland Hotspot. This project is motivated by the region’s complex geology and its highly debated tectonic history and disputed crustal affinity. This study aims to evaluate tectonic elements of the Northern Atlantic Ocean with three major objectives. The first objective is to develop a map of crustal thickness from publicly available seismic refraction data. For the second objective, …

A Guide To Sexual Intimacy Following Spinal Cord Injury, Jillian M. Olenick

Entry Level Occupational Therapy Doctoral Capstone Projects Class of 2025

A Guide to Sexual Intimacy Following Spinal Cord Injury is a two-part manual that was created to increase the knowledge related to how sex can be impacted following a spinal cord injury. The first manual was created as a guide for individuals with spinal cord injuries and their partners to enhance their knowledge on how their spinal cord injury may impact their sexual functioning. The second manual was created as a guide for occupational therapy practitioners to use as a resource when addressing sex with their clients following a spinal cord injury. Each manual provides information related to sexual intimacy, …

Management Approaches To Spastic Gait Disorders, Sheng Li, Tulsi Pandat, Bradley Chi, Daniel Moon, Manuel Mas

Faculty, Staff and Student Publications

Spastic gait presents clinically as the net mechanical consequence of neurological impairments of spasticity, weakness, and abnormal synergies and their interactions with the ground reaction force in patients with upper motor neuron syndromes and with some neuromuscular diseases. It is critical to differentiate whether the primary problem is weakness or spasticity, thus better understanding different phenotypes of spastic gait disorders. Pelvic girdle abnormality plays a pivotal role in determining the clinical presentation of gait disorders, since it determines the body vector and compensatory kinetic chain reactions in the knee and ankle joints. Knee joint abnormality can be a mechanical compensation …

Retinal Vascular Dysfunction In The Mthfr(677c>T) Mouse Model Of Cerebrovascular Disease, Alaina M Reagan, Michael Maclean, Travis L Cossette, Gareth R Howell

Faculty Research 2025

INTRODUCTION: Investigations of retinal biomarkers for Alzheimer's disease (AD) and AD and related dementias (ADRD), has increased significantly. We examine retinal vascular health in a mouse containing the ADRD risk variant Mthfr

METHODS: Morphology and function of retinal vasculature and neurons were assessed using in vivo imaging, immunohistochemistry, and pattern electroretinography. RNAscope and proteomics were employed to determine Mthfr gene expression and differential protein expression in mice carrying Mthfr

RESULTS: Mice show age- and sex-dependent retinal vascular deficits, displaying similarities to previously published brain data. Mthfr is widely expressed and co-localizes with vascular cell markers. Proteomics identified common molecular signatures …

Quicknotes August 2025, Southern Adventist University

QuickNotes – Advancement e-Newsletter

QuickNotes is an e-newsletter that comes from Advancement at Southern Adventist University. The August 2025 edition covers Southern's cocurricular collaborations and partners in prayer.

Layered Redactions: An Arts Based Research And Self Study Handbook For Art Teachers Navigating Professional Learning Communities, Audrea M. Danenhauer

Graduate Theses and Dissertations

This self-study contributes to the field of art education by examining the tensions and possibilities within Professional Learning Communities (PLCs) through an arts-based lens. Framed as both a love letter and a palimpsestic work, this thesis reimagines professional development as a layered, living practice, rooted in collective care and criticality. Using collage as both method and metaphor, the study interweaves Freire’s dialogic praxis, bell hooks’ radical tenderness, and the marginalia of a weathered PLC handbook—redacted, annotated, and reassembled with lived experience. Through deliberate redaction and reassembly, the research intentionally disrupts the normative invisibility of whiteness in educational structures, making visible …

Design, Modeling, Control, And Analysis Of A Modular Two-Wheeled Self-Balancing Robotic System, Mishek Jair Musa

Graduate Theses and Dissertations

Two-wheeled self-balancing robots have garnered substantial attention within the realms of research and innovation in academia and industrial settings. In particular, advances in control algorithms, machine learning, reinforcement learning, and sensor technologies have played a pivotal role in their development. Although primarily recognized for their utility in personal transportation in the commercial sector, these robots possess potential applications across various domains, including search and rescue, healthcare, material handling, logistics, etc., due to their active stabilization and exceptional maneuvering capabilities. A particular area of interest lies in the creation of modular self-balancing robots designed for seamless reconfiguration and enhanced human interaction. …

Crisis On The Frontlines: Recruitment And Retention Challenges In Ems, Bruce J. Moeller, Michael Lozano

Florida Center for Emergency Medical Services Research Reports

Florida’s emergency medical services (EMS) and fire service agencies face an unprecedented workforce crisis. Compounded by demographic shifts, rising call volumes, and mounting mental health challenges, many EMS agencies are struggling to recruit and retain qualified personnel. Existing models of recruitment—centered on short-term bonuses or messaging emphasizing sacrifice—are failing to resonate with new generations of workers, who prioritize mental wellness, career progression, and work-life balance. Additionally, outdated training pipelines and a decline in volunteerism, especially in rural areas, have weakened the traditional workforce structure, creating gaps that threaten the stability of emergency response systems statewide.

To address these challenges, the …

Nymc Synapse Issue 52, School Of Medicine Student Senate, New York Medical College

The Synapse

No abstract provided.

Exploring Ict Adoption In Teaching And Learning Of Science: A Case Of Senior Teachers In Kenya, David Odhiambo, Winston Edward Massam, Fredrick Mtenzi

Institute for Educational Development, East Africa

This study was conducted in Homa Bay Sub County, Kenya to explore the adoption of ICT among senior teachers, aged between 45-60 years, in teaching and learning of science. A qualitative research approach using a case study design was employed. Eight secondary school senior teachers of science, 2 females and 6 males, within Homa Bay Sub County were purposefully selected. Semi structured interviews were conducted one-on-one basis followed by classroom observation and document analysis. Analysis of the data revealed that senior teachers of science generally integrate ICTs in planning, assessment and in classroom teaching; however pedagogical preferences and teacher’s workload …

Decoding Anisotropic Porous Medium: A Synergy Of Lattice Boltzmann Modelling And Operator Learning To Predict Permeability As A Function Of Orientation, Soumya Shouvik Bhattacharjee

Open Access Theses & Dissertations

Understanding the directional properties of porous media is essential for accurately predicting flow behavior, reactive transport, and fluid-solid interactions in systems ranging from geothermal reservoirs to energy storage devices and biological tissues. Directional variations in permeability - reflecting a medium's response to flow at different angular orientations - are particularly important for complex, inherently anisotropic geometries. In this study, we employ a Lattice Boltzmann (LBM) model to calculate directional permeabilities from porous media images subjected to varying flow inlet angles. Three classes of porous media were investigated: (1) synthetic media with circular grains, serving as isotropic baselines; (2) synthetic media …

Markerless Clinical Gait Identification Using Computer Vision Techniques And Artificial Intelligence, Katelyn Conroy

Open Access Theses & Dissertations

Pose estimation algorithms could provide an unbiased examination for diagnosis, progression, and rehabilitation. PURPOSE: The purpose of this study was 1) to critically identify and appraise literature investigating spatiotemporal and kinematic gait characteristics in individuals with idiopathic Parkinson's Disease and spastic diplegic Cerebral Palsy compared to healthy controls; 2) to examine the validity and reliability of spatiotemporal gait characteristics and upper- and lower-body joint kinematics of OpenPose and the agreement with marker-based motion capture in healthy individuals; and 3) to examine the sensitivity, specificity and predictive values of a proposed clinical diagnostic tool using OpenPose in the diagnosis of idiopathic …

Restoring Balance: Choctaw Policy And The Environment In New Spain's Eighteenth-Century Frontier, Fior Daliso Garcia Lara

Open Access Theses & Dissertations

During the colonial period, Indigenous peoples in the Lower Mississippi Valley used their deep ecological knowledge to respond to imperial pressures. Eighteenth-century Louisiana was a contested borderland where Spain, France, and England vied for expansion through alliances, warfare, and trade with Native tribes. As European powers vied for control of the region, Native groups devised strategies to assert sovereignty over their territories and livelihoods. My dissertation examines the ecological history of the Choctaw and Spanish Louisiana from 1763 until the United States Indian Removal Act in the 1830s. It argues that imperial disputes over Indigenous lands compelled the Choctaw to …

Analyzing The Impact Of Approximate Arithmetic On Deep Neural Network Predictions, Johnatan Garcia

Open Access Theses & Dissertations

In recent times, we have seen the use of artificial intelligence in our daily lives. It helps us solve complicated problems. Some of these problems can be large and complex, requiring large models. As models grow in complexity, they require more computations and energy to be trained and tested. The execution of these models relies on floating-point arithmetic, which imposes constraints due to its finite precision. Due to these limitations, many of these computations are not exact. When this happens, computers are forced to round or approximate. We can use several number formats to circumvent this issue. For example, in …

Elucidation Of Nano-Mechanical Property Evolution Of 3d-Printed Zirconia, Diana Hazel Leyva Marquez

Open Access Theses & Dissertations

This dissertation presents an in-depth look at the mechanical behavior, size changes, and process improvement of ceramic and polymer materials made with additive manufacturing (AM). The work consists of four separate but related studies, each tackling important challenges in fabrication, characterization, and predictive modeling. Chapter 1 examines the nano-mechanical property changes of 3D-printed zirconia made using digital light processing (DLP). By employing nanoindentation and scanning electron microscopy (SEM), the effects of print orientation and sintering on hardness, elastic modulus, and microstructure are revealed. The results indicate that 0°-oriented sintered samples have up to 140% higher hardness compared to preconditioned samples, …

Effects Of Environmental Stressors On Human Tissue-On-A-Chip Platforms, Andie Padilla

Open Access Theses & Dissertations

As space exploration begins to extend beyond low earth orbit, it has become increasingly critical to understand the interaction of the extreme environment of space flight with human systems. While it is known that space-travel induces a vast array of complications to cardiac, neural, musculoskeletal, and immune systems, the mechanisms by which these complications occur are poorly understood. Current research to study the effects of microgravity and radiation are limited to ground simulations, which rarely account for the multifactorial stressors experienced during spaceflight, or long duration studies aboard the International Space Station. Similarly, traditional two-dimensional (2D) models lack the ability …

Humboldt County, Dennis Robert Sanchez

Open Access Theses & Dissertations

Danny Marquez, a police sergeant for the Los Angeles Police Department, takes his family on a vacation to Seattle, Washington. On the way, they stop in Humboldt County, and Danny is captivated by the beauty and serenity of this county. He imagines moving his family to Humboldt County and leaving the troubles of big city life behind. He applied for the position of Chief Inspector for the Humboldt Police. By the time he is hired, he loses both his son to Fentanyl and his wife to suicide. He is hired for the position but finds himself alone. He considers suicide. …

Perceptions Of Healthcare Students And Educators On Ai And Ar In Immersive Learning: A Phenomenological Study Of Empathy And Self-Efficacy Development In Palliative And End Of Life Care, Thomas Joseph Soto

Open Access Theses & Dissertations

As healthcare education evolves to address emotionally complex scenarios such as palliative and end-of-life care, there is an increasing need to integrate both technical and emotional competencies into training. This interpretive phenomenological study explored how artificial intelligence (AI) and augmented reality (AR)-enhanced immersive simulations shape healthcare students' empathy and self-efficacy. Grounded in Rogers' Client-Centered Theory and Bandura's Social Cognitive Theory, the research investigated the lived experiences of healthcare students and educators who participated in emotionally realistic simulations using AI-driven manikins and auditory AR features. Data were collected through semi-structured interviews and analyzed using a hybrid inductive-deductive coding framework, incorporating in-vivo …

The Moderating Effects Of Motivation And Adhd On The Relationship Between Academic Burnout And Prescription Stimulant Misuse Among College Students With Adhd, Joshua Matthew Villanos

Open Access Theses & Dissertations

This study examined whether ADHD symptom severity and motivational orientations moderate relationships between academic burnout and stimulant outcomes in college students with ADHD symptoms. Using a cross-sectional survey design, 180 undergraduate students who screened positive for ADHD symptoms completed measures assessing academic burnout, motivation orientations, ADHD symptomatology, and prescription stimulant misuse behaviors and expectancies. Testing these moderation hypotheses addresses important gaps in understanding risk and protective factors that may influence stimulant misuse risk. Negative binomial regression was employed for stimulant misuse analyses using the full sample (N = 180), while linear regression examined expectancies across all participants. Results revealed one …

Beyond The Bananas: Grief, Grace, & The Groove, Abby L. Asher

Research Papers

The term 'participatory documentary' was first coined by Bill Nichols, a documentary theorist. He describes it as a mode of documentary where the observer interacts with the observed, and the filmmaker becomes a subject of the film. What started as a little documentary about a minor league baseball team's line dance group composed of women over the age of 65, shifted when tragedy hit the 'observer'. It turned out these ladies were now in the right place at the right time to help guide the documentary maker out of her grief. What resulted was a new documentary with a participatory …

Comparative Analysis And Future Trends Of Friction And Regenerative Braking Systems, Madhukar Reddy Janga

Research Papers

The Research provides a full-scale analysis of traditional friction braked systems together with regenerative braking systems with focus on their working methods along with contemporary integration practices and forthcoming technological developments. Friction braking which has been widely used since long ago provides necessary dependable slowing abilities yet leads to substantial heat generation together with the release of harmful particles. Regenative braking systems that power electric and hybrid vehicles retrace vehicle momentum during braking to create stored electrical energy which results in better fuel economy with lower environmental effect. The research performs an in-depth analysis of braking system operational mechanics through …

Broadband Resilience By Zero Trust Community Network Policy Design, Lee W. Mcknight, Danielle Smith

The Lender Center for Social Justice

This paper proposes a Zero Trust framework for broadband policy design to enhance community network resilience. It provides a governance and policy perspective for ensuring secure, equitable broadband access.

Extended Program Notes For A Viola Graduate Recital, Maria Del Mar Anasco Mina

Research Papers

María del Mar Añasco Mina, for the Master of Music degree in Performance, presented on April 10, 2025, at Southern Illinois University Carbondale.

TITLE: EXTENDED PROGRAMS NOTES FOR A VIOLA GRADUATE RECITAL MAJOR PROFESSOR: Dr. Rossana Cauti.

This research paper is an expanded version of the program notes for the author’s viola graduate recital on December 8, 2024, at the Old Baptist Foundation in Carbondale, Illinois. The paper includes two works originally written for the instrument and two adapted. With Dr. Rossana Cauti’s help, the author chose four works to prepare a viola graduate recital, including works from different countries …

The Lived Experiences Of Navajo Nurses During The Covid-19 Pandemic, Stephnie Ann Leeson

Electronic Theses and Dissertations

When COVID-19 was diagnosed on the Navajo Nation, the impact on the people and the healthcare system was not understood. For almost three years, Navajo healthcare workers battled what was known to the Navajo as Dikos Nitsaaígíí Náhást’éíts’áadah, translated as The Big Cough. The Navajo Nation President, Jonathan Nez, referred to it as a Monster, as did many people in the Navajo Nation. Navajo nurses on the frontlines battled the monster daily as they saw friends and relatives succumb to the insidious disease. Much has been written about nurses off the reservations working on the frontline during the pandemic. However, …

Effect Of Fermentation On The Phsyco And Functional Properties Of Red Sorghum Flour (Sorghum Bicolor L.), Elazmanawati Lembong, Endah Wulandari, Putri Widyanti Harlina, Syifa Tsalitsu

Chimica et Natura Acta

Modification of red sorghum flour by fermentation method can improve the physical, chemical, and functional properties of the resulting sorghum flour. The purpose of this study was to determine the fermentation time that can affect the physical and functional characteristics of red sorghum flour fermented spontaneous (TSS) and non-spontaneous (TTS). Results indicated that the best treatment was red sorghum flour fermented at 24 hours both spontaneous and non-spontaneous. TSS at 24 hours had a water absorption capacity of 1.04%, oil binding capacity of 1.04%, swelling volume of 7.47%, solubility of 7.57%, initial gelatinization temperature of 76.56oC, peak viscosity of 2855 …