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The Forensic Implications Of Hydrochloric Acid (Hcl) Exposure On Dna Preservation In Human Teeth, Shaelyn Lee Zimmerman

Graduate Student Theses, Dissertations, & Professional Papers

Identity is a human right, and forensic anthropological methods are often aimed at returning identity to decedents. Three main pathways are used for the identification of human remains: fingerprints, dental records, and DNA analysis. Identification efforts may be hindered when perpetrators attempt to obscure the victim’s identity. In cases where corrosive substances, such as hydrochloric acid (HCl) are used, dental comparison and fingerprinting often fail and genetic analysis becomes the best chance of achieving personal identification.

Previous studies have shown teeth are an excellent source of DNA. Large, multi-rooted teeth, such as molars, are often preferred because they contain the …

Skeletal Dna Mapping Of The Post-Cranial Skeleton For The Identification Of Human Remains In A Modern Forensic Context, Mykala Denise Ward

Graduate Student Theses, Dissertations, & Professional Papers

Human identification is a central goal of forensic anthropology and forensic molecular anthropology, particularly when remains are skeletonized, fragmented, degraded, or otherwise visually unidentifiable. Although skeletal elements such as teeth, the petrous portion of the temporal bone, and major long bones are commonly prioritized for DNA sampling, they are not always available, intact, or suitable for destructive analysis. This dissertation evaluates DNA preservation across the post-cranial skeleton to determine whether anatomical location, biological sex, and age-at-death influence DNA quantity and downstream forensic genetic success.

Surface cortical bone samples were collected from predetermined anatomical locations across four modern skeletonized individuals. DNA …

Between Care And Protection: Constraints On Political Authority In Kamala Harris's 2024 Presidential Campaign, Marissa Barbara Pax

Graduate Student Theses, Dissertations, & Professional Papers

Competing expectations about strength, care, and protection shape how presidential leadership and authority are constructed in contemporary U.S. politics, particularly for members of marginalized communities. This thesis examines Kamala Harris’s 2024 presidential campaign as a case study to explore how candidates negotiate competing understandings of political authority through appeals to Lakoff’s (2002, 2008) Strict Father Morality and the Nurturant Parent Morality. An analysis of her campaign reveals that Harris repeatedly appeals to both moral frameworks, constructing authority through empathy, mutual responsibility, and care while also emphasizing threat identification, protection, discipline, and moral strength. Although Harris successfully mobilizes the rhetorical resources …

Unmuted: An Augmentative And Alternative Communication User’S Experience In Accessing And Engaging In Mental Health Care, Kanbi Faith Knippling

Graduate Student Theses, Dissertations, & Professional Papers

Communication accessibility is a critical yet underexamined factor influencing access to and engagement in mental health care for individuals who use augmentative and alternative communication (AAC). Existing literature suggests that AAC users experience significant barriers to obtaining communication-accessible mental health services, including limited provider preparation, communication-related assumptions, and broader structural inequities. Despite growing recognition of these concerns, little research has explored how AAC users experience and navigate mental health counseling or how communication accessibility shapes participation in care.

This single-case study explored communication accessibility within the context of an adult AAC users' experiences accessing and engaging in mental health counseling. …

A Psychogeography Of The Lower Colorado River Basin, Arren L. Kimbel-Sannit

Graduate Student Theses, Dissertations, & Professional Papers

Dried-up canals. Superheated strip malls. Proliferating data centers. Infinite appetite for growth despite its apparent circumstances. Arizona may well be the state of the American future. This multi-genre series of essays from Arren Kimbel-Sannit offers a personal, political-economic and ecological critique of growth and accumulation in Arizona — from the perspective of someone who grew up in its suburban expanses, reported on its politics, and long sought to clarify his relationship with home.

High Algal Biomass Is Decoupled From Metabolism In The Gallatin River, Cora Mae Steinbach

Graduate Student Theses, Dissertations, & Professional Papers

Assessing eutrophication in rivers is difficult compared to lakes and coastal waters, because most algal biomass occurs on the riverbed and flows interact and co-vary with production (Biggs and Close, 1989; Bernhardt et al., 2018). Riverine eutrophication is typically assessed using algal biomass and water column nutrients (U.S. Environmental Protection Agency, 2000), but biomass is highly variable and labor-intensive to measure, while nutrient concentrations often underestimate enrichment due to rapid biological uptake (Dodds and Smith, 2016). Reach-scale river metabolism can help evaluate long-term functional change in rivers recovering from nutrient enrichment (Arroita et al., 2019; Jankowski et al., 2021; Diamond …

Thistlebloom Moondog, Gary W. Jensen

Graduate Student Theses, Dissertations, & Professional Papers

An aging grieving artist decides to write a memoir as part of a self-healing process, using samples of song lyrics from his extensive collection of original Americana songs as narrative prompts.  Steeped in wanderlust, aspiration, paradox and dysfunction, his is a tale of vexing sub-clinical troubles rooted in the mire of developmental and religious trauma.

The Experience Of A Single Parent Participating In Child-Parent Relationship Therapy: An Instrumental Single-Case Study, Matthew Nicholas Schramm

Graduate Student Theses, Dissertations, & Professional Papers

Traditional family structures in the United States have shifted significantly, with single-parent households facing systemic barriers that increase parental stress and strain the parent-child relationship. As this bond is critical for healthy child development, accessible mental health support is essential for these families (Parache et al., 2023).

Child Parent Relationship Therapy (CPRT), a ten-week evidence-based program, strengthens this bond by training caregivers to use play as a therapeutic tool (Landreth & Bratton, 2020). This instrumental single case study (Stake, 1995) examined one single-parent's experience of CPRT delivered in a condensed four-week telehealth format, addressing the limited representation of single-parent households …

Governance By Numbers And The Architecture Of Anxiety A Human-Capital Efficiency Analysis In Global Higher Education, Sukanya Kemp

Graduate Student Theses, Dissertations, & Professional Papers

There has been a movement of global university rankings from the margins to the center of higher education governance. These metrics are now treated as external performance indicators in institutional strategy formation. In this dissertation an Architecture of Anxiety created by these rankings was explored, specifically examining how ranking volatility functions as a signal of environmental uncertainty and resource risk. To bypass the Transparency Barrier inherent in global financial data, given the effects of internal political considerations on data reporting, a human-capital-centered approach was adopted. By utilizing academic staff full-time equivalents (FTE) as the primary analytical input, universities were reframed …

Real-Time Immersive Wildfire Simulation: A Game Engine Approach, Jake Bova

Graduate Student Theses, Dissertations, & Professional Papers

Wildfires are growing in frequency, size, and severity, placing escalating demands on firefighting resources and putting lives, property, and ecosystems at risk. Accurate prediction of fire behavior is critical to suppression planning, evacuation decisions, and firefighter training, yet the operational models that fire managers rely upon face a persistent tradeoff. High-fidelity physics-based models capture fire–atmosphere interactions faithfully but are computationally expensive, often running far slower than real time on CPU hardware, while faster empirical models sacrifice the dynamic coupling between a fire and the wind field it generates. Furthermore, most existing tools produce abstract, two-dimensional outputs that offer limited visual …

Spatiotemporal Dynamics Of Mountain Front Recharge Flow Paths And Their Contribution To Alluvial Aquifer Water Supply, Mikaela Bollag-Miller

Graduate Student Theses, Dissertations, & Professional Papers

Mountain Front Recharge (MFR) is a critical recharge source for alluvial basin aquifers throughout the Intermountain West, yet the spatial and temporal dynamics of distinct recharge pathways remain poorly constrained. This study investigates the seasonal and spatial dynamics of MFR pathways and evaluates their impact on the Missoula Aquifer, a sole-source alluvial aquifer in western Montana, USA. MFR includes both surface-water inflows from mountain areas and Mountain Block Recharge (MBR), the groundwater contribution to the basin aquifer. A valley-scale water balance was employed to estimate first-order contributions and temporal fluctuations of MBR flow paths. A three-layer steady-state MODFLOW groundwater model …

Evaluating Multi-Year Transferability Of Single- And Multi-Class Machine Learning For Remote Monitoring Of Beaver-Engineered Landscapes, Harris J. Sloan

Graduate Student Theses, Dissertations, & Professional Papers

Long-term satellite image archives enable ecological monitoring at large scales, but manual extraction of fine-grained features (e.g., beaver dams) remains time-consuming. Machine learning models may automate these tasks, but their temporal transferability for multiannual monitoring is still poorly resolved.

We evaluated the performance of two complementary neural-network frameworks across a 100,000-hectare watershed in Montana USA, using a decade of satellite imagery (2014-2024): (i) a single-class ResNet-50 beaver dam detector, and (ii) a multi-class ResU-Net landcover classifier.

In 2024, the dam detector identified 352 of 404 mapped dams, achieving balanced accuracy = 93.6%, precision = 79.8%, recall = 87.1%, F1 = …

Feral Horses And Native Ungulates: Evaluating The Potential For Competition In Predator–Prey Communities Of Alberta’S Upper Foothills, Birch Gano

Graduate Student Theses, Dissertations, & Professional Papers

Feral herbivores are expanding in range and numbers globally, yet their community-level effects in ecosystems are poorly resolved. We evaluated whether feral horses reshape predator–prey–vegetation dynamics in Alberta’s Upper Foothills, Canada, through two pathways; i) potential exploitative competition for forage and ii) apparent competition via shared predators. We combined fecal DNA metabarcoding with remote wildlife cameras to quantify diets, spatiotemporal co-occurrence, and the role of horses in carnivore diet. We analyzed 241 ungulate scats (feral horses, elk, bighorn sheep, cattle, moose, and deer), 96 combined camera-years at 23 sites, and 190 carnivore scats (wolves, cougars, coyotes, bears) from 2023–2025. The …

Winding Roads: A Qualitative Phenomenological Study Of Female Educational Leadership, Nicole Casper

Graduate Student Theses, Dissertations, & Professional Papers

The experiences of female superintendents were examined in this study to provide insight into the commonalities in their leadership journeys within public school organizations. A phenomenological, qualitative approach, aligned with Moustakas’s (1994) framework, was used to explore participants’ shared experiences. Comprehensive interviews were conducted with 17 female superintendents serving during the 2022–2023, 2023–2024, and/or 2024–2025 academic years in the states of Idaho, Montana, Oregon, and Washington. Through phenomenological reduction, three overarching commonalities emerged: (a) barriers, (b) challenges, and (c) supporting factors. The findings illuminate how organizational, societal, and gendered influences interact to shape female leadership advancement toward assistant superintendent or …

Instructor Created Video: Differences In Perception Of Administrative Support In Respiratory Care, Brian Daniel Cayko

Graduate Student Theses, Dissertations, & Professional Papers

Background: The recent proliferation of online education has highlighted the need to reduce transactional distance and increase the community of inquiry presence between the instructor and students and between students. This quantitative non-experimental study examined the differences in perception of administrative support for instructor-created video (ICV) between faculty and administrators within Commission on Accreditation of Respiratory Care (CoARC) higher education programs of Respiratory Care. Methodology: The Difference in Perception of Administrative Support (DPAS) survey was utilized to collect data from 93 valid participants through a snowball sampling method. Analysis was performed using an independent samples t test and Cohen's d …

Beyond Words: The Horse-Human Encounter In Equine-Assisted Psychotherapy For Residential Substance Use Treatment, Leah Finch Lungren

Graduate Student Theses, Dissertations, & Professional Papers

Equine-assisted psychotherapy (EAP) has emerged as a promising experiential therapeutic intervention, yet the lived experience of adults participating in EAP within residential substance use disorder (SUD) treatment settings remains underexplored. This hermeneutic phenomenological study examined the lived experience of 12 adults who participated in EAP groups during residential SUD treatment across three treatment facilities in the United States. The primary research question was: What is the lived experience of participating in EAP for adults in residential SUD treatment? Data was collected through semi-structured interviews and analyzed through iterative hermeneutic interpretation guided by van Manen’s (1990) existential framework.

Six themes emerged …

Integrating Hippotherapy Into Interprofessional Aphasia Rehabilitation: A Feasibility Pilot Study, Bethany H. Wenger

Graduate Student Theses, Dissertations, & Professional Papers

Background and Significance: Stroke remains a leading cause of disability in the United States, affecting over 2.5 million individuals annually. Stroke-related motor and communication deficits often co-occur, increasing challenges for recovery, increasing social isolation, depression, and dependency. Hippotherapy has emerged as a novel treatment approach for neurorehabilitation; however, its application within interprofessional models for individuals with stroke-related motor and communication impairments remains underexplored. This study examines the feasibility, fidelity, and acceptability of an interprofessional intervention using hippotherapy for adults with chronic post-stroke aphasia, the purpose of which is to generate methodological guidance for future controlled trials.

Methods: A non-randomized, single-group …

Integrating Perspectives Of People With Aphasia: A Holistic Approach To Community Aphasia Groups Within An Intensive Comprehensive Aphasia Program, Mckinlee A. Mihelish

Graduate Student Theses, Dissertations, & Professional Papers

Introduction: People with aphasia (PWA) experience chronic communication deficits that impact daily life. Community Aphasia Groups (CAGs) are commonly used to address these challenges and have demonstrated psychosocial and communicative benefits; however, they lack standardized structure and are implemented with variability across settings. Additionally, much of the existing research focuses on group-level outcomes rather than participant-driven priorities, limiting clinicians’ ability to tailor interventions. This study examined what PWA want from CAG participation and how these priorities may change over time.

Methods: This quantitative study investigated priority changes among PWA participating in a CAG within a summer 2025 Intensive Comprehensive Aphasia …

What Really Matters In Behavioral Cough Suppression Therapy? A Retrospective Look At Targeted Treatment Components, Mary B. Walsh, Laurie Slovarp, Kassidi Heinle, John Quindry, Jane Salois

Graduate Student Theses, Dissertations, & Professional Papers

Background: 
Refractory chronic cough (RCC) is a prevalent condition that substantially impairs quality of life and is associated with significant physical, psychological, and social burden. Behavioral cough suppression therapy (BCST), delivered by speech-language pathologists, is an evidence-based nonpharmacologic intervention shown to improve cough-related quality of life. However, variability exists in how BCST is implemented, and the relative contribution of specific treatment components remains unclear.

Objective: 
To evaluate the effectiveness of a BCST program implemented in a community otolaryngology clinic that emphasizes consistent suppression at the urge-to-cough and neuroplasticity-informed behavioral principles.

Methods: 
This observational retrospective case series examined clinical records of …

An Exploratory Analysis Of The Role Of Sex In Load Carriage, Rachel E. Perez, Dustin R. Slivka, Brent C. Ruby

Graduate Student Theses, Dissertations, & Professional Papers

Axially loaded weight may impose a metabolic demand equivalent to that of fat mass (FM) during load carriage. Males (M) typically have a lower body fat percentage than females (F), resulting in metabolic demand differences during load carriage that may be mitigated by accounting for FM in pack loads. PURPOSE: To determine whether normalizing pack load to FM equalizes metabolic cost across sexes during load carriage. METHODS: Twenty-eight participants (14M, 23 ± 5 y, 1.81 ± 0.07 m, 78.7 ± 10.0 kg, 12.7 ± 5.4% body fat, VO₂peak 4.18 ± 0.54 L·min^-1; 14F, 22 ± 4 …

Velocity Based Training In Athletic Development, Ross Martin Sangalang

Graduate Student Theses, Dissertations, & Professional Papers

The foundation of high-level sport performance is the ability to produce and express force rapidly across the task-specific temporal demands of sport. Traditional percentage-based prescription methods have long been used to develop hypertrophy, maximal strength, and power; however, fixed %1RM prescriptions fail to account for daily undulations in athlete readiness, accumulated fatigue, and changes in neuromuscular capacity. Velocity based training (VBT) offers a practical framework to regulate training through measurement of concentric velocity, allowing coaches to more accurately prescribe loads, stringently monitor repetition quality, and precisely regulate fatigue. This review discusses the neuromuscular qualities underpinning success in athletic endeavors, limitations …

Initial Qualitative Inquiry Into Social Proverb Use And Acceptability, Emma K. Hinds

Graduate Student Theses, Dissertations, & Professional Papers

Currently,  1 in 36 individuals are diagnosed with autism spectrum disorder (ASD), which is characterized by social communication differences and restricted and/or repetitive behaviors. Many children with ASD also present with sensory, behavioral, and emotional differences, underscoring the need for specialized, evidence-based interventions. Social proverb is a novel intervention approach developed by Dr. Schoffer Closson that provides in-the-moment guidance by explicitly stating expected social behaviors and the rationale behind them (e.g., “We cover our coughs, so we don’t spread germs”). To date, no research has examined the use of social proverbs as an intervention strategy. The purpose of this qualitative …

Probing Proficiency-Related Neural Representations With Pca And Ica, Onila R. Narayana Mudalige Don

Graduate Student Theses, Dissertations, & Professional Papers

How proficiency-related information is represented in task fMRI depends not only on the data themselves, but on the representational lens used to summarize them. This thesis examines second-language (L2) proficiency as a problem of representational organization rather than as a simple classification exercise. Using task fMRI from adult language learners performing semantic animacy judgments in their native language (L1) and second language (L2), I derive shared low-dimensional network representations with principal component analysis (PCA) and independent component analysis (ICA), then evaluate those representations under matched leakage-controlled decoding pipelines.

Across analyses, the central comparison is between representational frameworks rather than between …

Cormac’S Court: Knights Without God In A Savage Land; Or, Chivalry And Existentialism In Cormac Mccarthy’S The Road, Zoë Margaret Metelerkamp

Graduate Student Theses, Dissertations, & Professional Papers

Cormac McCarthy scholars have examined the influence of romantic grail quest literature and existential philosophy on McCarthy’s oeuvre, but they have treated these subjects independently of each other. This thesis offers a novel exploration of McCarthy’s use of these specific philosophical and literary precedents by focusing on the ways The Road unifies medieval literary principles in Chretien’s Perceval with the existential chivalry Søren Kierkegaard extrapolates in Fear and Trembling.

Bridging The Gap: Evaluating Gnss-Derived Total Water Storage As A Groundwater Monitoring Tool In The Colorado River Basin, Michelle Lee Barton

Graduate Student Theses, Dissertations, & Professional Papers

Groundwater resources in the Colorado River Basin are critically stressed yet remain under-monitored and under-regulated, creating urgent need for reliable, continuous observations at multiple spatial scales. This study evaluates the performance of the University of Montana Global Navigation Satellite Systems (GNSS) terrestrial water storage dataset as a tool for bridging groundwater monitoring gaps across the Upper and Lower Colorado River Basins between 2006 and 2024. We compare GNSS-derived total water storage and groundwater storage estimates against NASA’s Gravity Recovery and Climate Experiment (GRACE) satellite observations and in-situ groundwater well measurements at regional and sub-regional scales. We employ a Bayesian autoregressive …

Psychological Distance And Auditor Assessment Of The Severity Of An Internal Control Deficiency, Scott C. Jackson, John D. Keyser, Douglas F. Prawitt

Faculty Publications

Auditors often underestimate the severity of internal control deficiencies, particularly when associated misstatements are immaterial. We find that auditors are more likely to correctly classify a material weakness when no misstatement information is provided than when misstatement information is available, and that this finding may unconsciously arise from auditors’ construal level in judging control deficiency severity. Through a series of experiments, we manipulate misstatement information related to an internal control deficiency designed to represent a material weakness. We hold the size of potential misstatement constant and find that auditors and graduate auditing students are less likely to correctly assess the …

Aquatic Habitat Use By Western Toads And American Bullfrogs In California’S Central Valley: Effects Of Local Habitat Characteristics And Landscape Composition, Kaitlyn Breana Hernandez

Cal Poly Humboldt theses and projects

Drastic losses of historic wetland habitat in the California Central Valley have caused widespread population declines and extirpations of aquatic breeding amphibians. Efforts to restore wetland habitat have included private land, which represents 70% of land tenure in the Central Valley. Management of these restored wetlands is focused on waterfowl with the assumption that they will provide habitat for native herpetofauna. This study used combined surveys to test the assumption that restored wetlands on private land provide habitat for native amphibians with the western toad (Anaxyrus boreas) as a case study. The objectives were to use environmental DNA …

The Effects Of Temperature On The Persistence Of Environmental Dna In Self-Preserving Filters, Megan Boche

Cal Poly Humboldt theses and projects

This study investigates the effectiveness of self-preserving filter packs (filters designed to passively dry and stabilize captured eDNA without liquid preservatives or cold-chain) in maintaining the integrity of environmental DNA (eDNA) under varying temperature and environmental conditions. eDNA degradation was assessed at three temperatures (23, 33, and 43 °C) using water collected from two distinct study sites that differ in species composition and salinity, a freshwater hatchery and a brackish lagoon. To capture early degradation dynamics, eDNA concentrations were quantified using quantitative PCR assays immediately after filtration (t = 0) and after 2, 4, 8, 16, 32, and 64 days …

Coho Salmon (Oncorhynchus Kisutch) Response To Habitat Restoration Through Space And Time: Monitoring Growth, Survival, And Movement In A Restored Habitat Network, Carter Perez Adamson

Cal Poly Humboldt theses and projects

Despite the decline of coho salmon (Oncorhynchus kisutch), Prairie Creek, a tributary of Redwood Creek in northern California, remains a coho salmon stronghold. The restoration of juvenile coho rearing habitat was identified as a recovery objective in this watershed by the National Marine Fisheries Service. Among the restoration projects addressing this objective are an ongoing project on Prairie Creek and its tributary Skunk Cabbage Creek, and a prior effort on Strawberry Creek (a tributary of Redwood Creek’s estuary). Standard monitoring methods for assessing project success have limitations and may be improved by measuring salmon use of restored habitats …

Relational Approaches To Fire Resilience: Designing A Living Shaded Fuel Break With Indigenous Knowledge Systems, Natalee Nicole Lopes

Cal Poly Humboldt theses and projects

Escalating wildfire severity across California reflects not only changing climatic conditions but also the cumulative impacts of colonial land management systems that have disrupted Indigenous fire stewardship and altered forest structure and function. This project examines how wildfire mitigation infrastructure, specifically linear fuel treatments, such as fuel breaks, can be reimagined through Indigenous relational frameworks of care-based land stewardship. Grounded in Happy Camp (Athithúfvuunupma), California, within the ancestral homelands of the Karuk Tribe along the mid-Klamath River, this research is carried out in collaboration with Karuk knowledge holders, centering Indigenous knowledge systems and priorities.

Using a mixed-methods approach that integrates …