Digital Commons Network^™

Teacher Views Of Augmentative And Alternative Communication With Nonverbal Students With Severe Intellectual Disabilities: A Generic Qualitative Study, Lelita K. Thomas

Theses and Dissertations

Students with significant intellectual disabilities who are nonverbal often depend on augmentative and alternative communication devices to engage with lessons and participate in secondary educational environments. Despite advancements in this technology, issues pertaining to training, consistency, and institutional support persist, hindering effective application in urban schools. The objective of this generic qualitative study was to investigate the perspectives of teachers and related service providers regarding the utilization of these devices for nonverbal students with severe intellectual disabilities in urban secondary schools.

Data were gathered via semi-structured interviews with 11 participants, comprising special education instructors, related service providers, and special education …

Egalitarianism Is Not Equality: Moving From Outcome To Process In The Study Of Human Political Organisation, Duncan Stibbard-Hawkes, Christopher Von Rueden

Jepson School of Leadership Studies articles, book chapters and other publications

Many traditional subsistence groups have been described as ‘egalitarian societies’. Definitions of ‘egalitarianism’, especially beyond anthropology, have often emphasised equality in resource access, prestige or rank, alongside generalised preferences for fairness and equality. However, there are no human societies where equality is genuinely realised in all areas of life. Here we demonstrate, empirically, that nominally egalitarian societies are often unequal across seven important interconnected domains: embodied capital, social capital, leadership, gender, age/knowledge, material capital/land tenure, and reproduction. We also highlight evidence that individuals in nominally egalitarian societies do not unfailingly adhere to strong equality preferences. We propose a new operational …

Corporate Scenarios: Drawing Lessons From History, Madison Condon

Faculty Scholarship

As corporations are increasingly pressed to reveal information about their exposure to climate-related risks, they are often asked to undertake and disclose the outcome of “scenario analysis.” In this exercise, corporations, including financial institutions, examine how their business would fare under different pathways the future may take. One oft-used scenario, for example, is the International Energy Agency’s “Net-Zero by 2050: A Roadmap for the Energy Sector.” This Essay presents a history of the use of scenarios as a corporate planning tool, particularly in the oil industry, arguing that it is key for understanding our present moment and the role of …

Conservation And Survey Division 2024 Annual Report, R.M. Joeckel, Michele Waszgis

Conservation and Survey Division: Faculty and Staff Publications

The Conservation and Survey Division of the University of Nebraska - Lincoln is the agency designated by statute to investigate and interpret the geologically related natural resources of the State, to make available to the public the results of these investigations, and to assist in the development and conservation of these resources. It consists of program areas in geology, water, soils and remote sensing-geographic information systems.

Early Holocene Interaction Of Aeolian, Alluvial, And Lacustrine Processes In A Dune-Dammed Valley In The Central Nebraska Sand Hills, Gpsia Mahoney, R. D. Mandel, P.R. Hanson, Sherilyn Fritz

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Stratigraphy And Osl Chronology Of Lunette Deposits Indicates That Nebraska’S Rainwater Basins Formed By Aeolian Deflation Between 39 And 25 Ka, P.R. Hanson, Robert Matthew Joeckel

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Legislative Impacts On K-12 Social Studies Teacher Identity, Curricular Decision-Making, And Receptiveness To Professional Development, Staci Fisher

Theses and Dissertations

This applied dissertation examines how K-12 public school social studies teachers are navigating their instructional decision-making regarding content about marginalized groups in response to state legislation. Quantitative data were collected through an online Likert-scale survey to measure teachers’ reported agreement on how state legislation has impacted their instructional decision-making, job satisfaction connected to their professional and personal identities, inclusion of instructional materials, and receptiveness to professional development.

Following data collection, the researchers analyzed whether factors of district political context and teachers’ personal and professional identity characteristics predicted their responses. Survey results showed most teachers reported feeling that state legislation has …

Exploring Belmont’S Herbarium, Corinne Parker, Darlene Panvini

SPARK Symposium Presentations

The Belmont University Herbarium is a collection of plant samples used to document species. These specimens have been collected by Belmont students since 1973, helping to document the flora of Middle Tennessee. This semester, the specimens were organized and their identifications were confirmed. Updating the herbarium’s organizational system allowed for some specimens that were not fully prepared to be identified and processed, increasing the number of specimens that the university can use for teaching and research purposes. The number of specimens, families, and commonly collected families will be reported. Recommendations will be provided for further collecting to expand the herbarium …

Finite Element Modeling For Two-Dimensional Wireless Capsule Endoscope Manipulation System, Wael S. Abbas, Mohamed T. El-Wakad, R.R. Darwish

Trends in advanced sciences and technology

The inadequacies of traditional flexible endoscopes used in gastrointestinal diagnostic procedures, causing pain and discomfort to patients, led to the development of the wireless capsule endoscope. There are two types of wireless capsule endoscopes: passive and active. The passive wireless capsule endoscope cannot stop at a specific position for diagnostic purposes, which can lead to capsule retention. The active capsule can solve those problems. In this article, we use COMSOL Multiphysics to simulate a two-dimensional (2D) electromagnetic actuation (EMA) system for active wireless capsule endoscope. The EMA system uses a stationary two-pair coil system (Helmholtz and Maxwell). The capsule endoscope …

Field-Validated Load Modelling And Prediction-Driven Bess Sizing For Oil Drilling Microgrids, Omar H. Abdalla, Alaa A. Afifi, Amr Kassem, Ismail M. Mosaed

Trends in advanced sciences and technology

Diesel-based microgrids serving oil drilling operations are subject to sharp and unpredictable load fluctuations that lead to generator underloading, elevating specific fuel consumption (SFC), and reducing system reliability. Conventional battery energy storage system (BESS) sizing methods typically depend on long-term field measurements and static load assumptions, which fail to capture the real transient nature of drilling processes. This paper develops a framework for BESS sizing that directly integrates a measurement-based machine learning (ML) load prediction model. The adopted model, built using the exponential Gaussian process regression (GPR) technique, has been trained and validated on six months of high-resolution field measurements …

Multiscale Computational Chemistry Studies Of The Catalytic Mechanisms Of Non-Heme Fe(Ii)/2-Oxoglutarate-Dependent Oxygenases, Simahudeen Bathir Jaber Sathik Rifayee

Dissertations, Master's Theses and Master's Reports

Enzymes catalyze complex biological transformations. Non-heme Fe(II)/2-oxoglutarate (2OG)–dependent enzymes are highly versatile catalysts capable of selective C–H oxidation, enabling transformations such as hydroxylation, halogenation, desaturation, demethylation, ring rearrangements, epoxidation, and electrophilic aromatic substitution. These enzymes are involved in various biological processes, including fatty acid metabolism, hypoxic signaling, collagen maturation, and transcriptional regulation. Computational Modeling provides detailed knowledge of the enzymes including atomistic details of the important catalytic species, conformational and electronic effects, which are crucial to enzyme engineering and drug design efforts. This dissertation implements advanced multi-scale molecular modelling techniques including Molecular dynamics and Quantum Mechanic / Molecular Mechanics calculations …

Old, Flat, And Slow: Interior Greenland Snow And Ice Dynamics Revealed With Gnss, Derek James Pickell

Dartmouth College Ph.D Dissertations

The interior dry snow zone region of the Greenland Ice Sheet can no longer be confidently considered a reliably melt-free region, yet our ability to investigate and quantify the dynamic nature of this landscape is hindered by its remoteness. To overcome this challenge, this work describes a novel, low-cost, low-power GNSS (positioning) instrument that enables simultaneous measurements of (1) ice accumulation/ablation changes and (2) 3D ice flow. Deployed in a dense array, these GNSS instruments achieve similar performance to scientific-grade, commercial options (cm- to mm- precision), yet operate at < 60% of the power and < 34% of the hardware cost. Over a three year campaign, we analyze spatial and temporal patterns of accumulation in this region, using a technique called GNSS interferometric reflectometry (GNSS-IR). Observations with this technique show low bias and high precision relative to a validation study (-2.1 ± 2.9 cm), while we also demonstrate for the first time how GNSS-IR can reveal cm- to m- scale surface roughness, a critical yet often neglected measurement due to longstanding observational challenges. Patterns of accumulation show a spatial dependence linked to surface slope (~+0.7 mm w.e. km^-1 westward away from the divide) while surface roughness has a temporal dependence likely driven by wintertime high winds. Next, we combine GNSS-IR surface heights with the geodetic position time series of the antenna to derive surface elevation changes, which are compared to coincident ICESat-2 laser altimetry elevations. Observations of the surface show a millimeter-level relative bias and cm-level precision (-0.9 ± 3.8 cm) compared with the satellite altimeter, demonstrating for the first time that this technique is a viable ground-truthing method, while ICESat-2 performance has continued to exceed mission performance requirements. Finally, we examine station positioning through time to show a sensitivity to dynamic ice thinning and firn densification, two parameters than cannot be finely observed with space-based methods in this region. Together, these results provide the first ground‑based, high‑resolution picture of interior ice‑sheet change—capturing accumulation, roughness, surface elevation, and strain in one unified dataset. Our approach dramatically lowers logistical barriers, opening the interior of Greenland (and other remote regions) to sustained, quantitative monitoring at unprecedented spatiotemporal resolution.

Transformer Models For Paraphrase Detection: A Comprehensive Semantic Similarity Study, Dianeliz Ortiz Martes, Evan Gunderson, Caitlin Neuman, Nezamoddin N. Kachouie

Mathematics and System Engineering Faculty Publications

Semantic similarity, the task of determining whether two sentences convey the same meaning, is central to applications such as paraphrase detection, semantic search, and question answering. Despite the widespread adoption of transformer-based models for this task, their performance is influenced by both the choice of similarity measure and BERT (bert-base-nli-mean-tokens), RoBERTa (all-roberta-large-v1), and MPNet (all-mpnet-base-v2) on the Microsoft Research Paraphrase Corpus (MRPC). Sentence embeddings were compared using cosine similarity, dot product, Manhattan distance, and Euclidean distance, with thresholds optimized for accuracy, balanced accuracy, and F1-score. Results indicate a consistent advantage for MPNet, which achieved the highest accuracy (75.6%), balanced accuracy …

The Economic Cost Of Exclusion: How Trump's Second-Term Immigration Policies Threaten California's Economy, Kit Johnson

Faculty Articles

The second Trump administration has pursued an array of immigration enforcement initiatives—from denaturalization and visa scrutiny to termination of humanitarian programs and aggressive workplace raids. Legal scholars have sharply debated these measures, but almost entirely through constitutional, statutory, and rights-based frames. This Article exposes a critical omission in immigration law scholarship: the economics of large-scale noncitizen removal. Drawing on major empirical studies of historic enforcement episodes—including Mexican repatriation between 1929-1934, Japanese internment during World War II, Arizona’s immigration restrictionism from 2007-2012, and federal immigration enforcement efforts of 2008-2015—this Article demonstrates that broad noncitizen removals may reduce the employment and wages …

Spatial Analysis Of American Chestnut (Castanea Dentata) Distribution And Ecology In Kentucky’S Federal Lands, Jacob Raymond Pease

Murray State Theses and Dissertations

Anthropogenic factors have been the cause of the decline of tree species across the globe. From unsustainable logging and development to disease and improper management, threats to forests have taken their toll. The American chestnut (Castanea dentata) was once an integral basal tree species in Appalachian forests, but chestnut blight drove the species to functional extinction by the mid-1900s. The recent creation of genetically modified chestnuts gives hope for future restoration of the species throughout its historical range. Despite blight resistance, effective restoration will require optimal site selection for finding and planting chestnuts, which will maximize limited resources. …

Predicting Capture And Survival Probabilities Of The Arizona Tiger Salamander: A Comparison Of Capture-Recapture Models, Brittney Nelson

Murray State Theses and Dissertations

Capture-recapture models are essential tools for estimating population dynamics in ecological studies. A fundamental component of these models is the capture history matrix, which records individual detection over time and serves as the basis for estimating survival and capture probabilities. This presentation explores three statistical approaches to these estimations: the Cormack-Jolly-Seber (CJS) model, the Hidden Markov Model (HMM) for CJS, and the Bayesian CJS model. The CJS model provides a likelihood-based framework for estimation, and the HMM CJS incorporates latent states into the model to account for uncertainty in detection. The Bayesian CJS extends this same analysis by integrating prior …

Identifying The Agricultural Mechanics Knowledge And Skills Needed By Kentucky Agriculture Teachers, Thomas Poole Jr

Murray State Theses and Dissertations

The agricultural industry increasingly relies on complex machinery and technology, creating a need for skilled workers that are proficient in agricultural mechanics. School-based Agricultural Education (SBAE) programs play a crucial role in preparing students for careers in this field. However, many agriculture teachers feel unprepared to teach agricultural mechanics due to gaps in technical skills, self-efficacy concerns, and safety considerations. This study sought to determine the agricultural mechanics knowledge and skills that Kentucky agriculture teachers need to successfully teach agricultural mechanics in SBAE programs across the state. Using Wells et al.'s (2021) Agricultural Teacher Education and Agricultural Industry Partnership Model …

Strong Neighborhood-Prime Labelings Under Ordinary & Gaussian Integers, Micheal Arnal-Brown

Murray State Theses and Dissertations

This thesis introduces and studies the notion of a strong neighborhood-prime labeling, a strengthening of the neighborhood-prime labeling where the label 1 can be assigned to any vertex in a graph. We prove that several graph families—including paths, cycles (excluding those congruent to 2 modulo 4), caterpillars, helm graphs, closed helm graphs, gear graphs, and graphs with universal vertices—admit such labelings, and also provide results to more general classes of graphs. We extend this new labeling concept to the Gaussian integers using a spiral order- ing on Z[i] and define a Gaussian analogue of strongly neighborhood-primeness. To support this extension, …

The Preferred Leadership Styles Of Generation Z Public Educators, Rex Booth

Murray State Theses and Dissertations

Amid declining enrollments in teacher preparation programs and increasing teacher turnover, understanding the characteristics of Generation Z, who constitute a substantial portion of the future workforce, is critical for effective recruitment and retention in education. This quantitative study explored the preferred leadership styles of Generation Z public educators in western Kentucky using the Multifactor Leadership Questionnaire (MLQ). Specifically, it examined preferences for transformational, transactional, and passive-avoidant leadership styles and assessed whether these preferences varied by race, gender, or years of experience. Results revealed a strong preference for transformational leadership, followed by transactional leadership, with a clear aversion to passive-avoidant approaches. …

New Psychoactive Substances Detected In Wastewater Samples Collected Along The Interstate Highway Rest Areas In Kentucky, Durga Prasad Kodati

Murray State Theses and Dissertations

The rapid emergence and proliferation of new psychoactive substances (NPS) pose significant challenges to public health and law enforcement. The potential for abuse and toxicity of these substances, which are intended to mimic the effects of controlled drugs, has been raising concerns as these compounds are designed to evade being regulated. There are traditional methods of tracking NPS, such as seizures and forensic toxicology, but they are delayed and seldom effective because these substances continue to evolve rapidly. Wastewater-based epidemiology (WBE) has emerged as a promising tool for real-time surveillance of drug consumption. The primary objective of this research was …

Bridging Diversity And Discipline: Stakeholder Perceptions Of Dei And Technical Rigor In Agriculture Education, David A. Yarbrough

Murray State Theses and Dissertations

School-based agricultural education (SBAE) serves as a foundational model for preparing students through classroom instruction, Supervised Agricultural Experiences (SAEs), and FFA involvement. This study examined the perceptions of Georgia high school agricultural educators regarding how diversity, equity, and inclusion (DEI) initiatives impact technical rigor and traditional agricultural knowledge within SBAE programs. Educators reported that DEI efforts did not compromise technical rigor, and traditional elements, such as SAE and FFA, remained central to program success. These findings suggest that inclusion and tradition can coexist, with DEI seen as a complement rather than a conflict with SBAE goals. The results provide valuable …

Using The Foundational Numeracy Transformation Cycle To Gain Insights And Perspectives On Teaching And Learning, Brooke Custis

Murray State Theses and Dissertations

The Foundational Numeracy Transformation Cycle (FNTC) was created in part to increase the percentage of students with disabilities performing at or above grade level in middle school mathematics. Through professional development and support, the FNTC worked within regional co-ops to increase math proficiency at all grade levels by building instructional capacity in primary educators. In addition to increasing student proficiency, the FNTC also aimed to enhance educator confidence in implementing Mathematical Teaching Practice (MTP) #2. This study used quantitative analysis to determine that participation in the FNTC had no statistically significant effect on student achievement. This study also explored the …

How Did The Covid-19 Pandemic Affect The Educational Level Of Students, Measured By The Act?, Davey A. Reed, Davey A. Reed

Murray State Theses and Dissertations

This study examined the relationship between socioeconomic status (SES), chronic absenteeism, and ACT performance among Alabama’s 4A public high schools, with a particular focus on how these factors evolved before and after the COVID-19 pandemic. Utilizing a longitudinal design, the research examined data from four academic years: 2019 (pre-COVID) and 2022, 2023, and 2024 (post-COVID). Data were obtained from the Alabama State Department of Education’s public report card portal and included ACT composite scores, school-level SES data, and chronic absenteeism rates. Schools were anonymized to ensure confidentiality and grouped into SES categories (Low, Mid, High) for comparative analysis. A combination …

Bridging Classroom And Competition: How Students With Intellectual Disabilities Learn And Apply Ffa-Related Skills, Skyler Lempert

Murray State Theses and Dissertations

Though people often hear about inclusion and differentiation in education and their classroom settings there are questions about the capability and effectiveness of students with moderate to severe disabilities to participate in intra-curricular activities such as the National FFA Organization. Often teachers are tasked with trying to find ways for students to be a part of these experiences with little education on this aspect. This research begins by examining the historical progress of special education, particularly in relation to students with moderate to severe disabilities. It then explores the complex educational needs of this population and how schools have worked …

Data Injustice In Global Justice, Asaf Lubin, Cherry Tang

Articles by Maurer Faculty

In May 2020, the United Nations Secretary-General unveiled a sweeping “Data Strategy for Action by Everyone, Everywhere,” seeking to unlock the UN’s “full data potential.” The International Criminal Court’s Office of the Prosecutor followed suit, declaring in 2023 its intent to acquire advanced cyber forensic tools so as to hold the “widest range of digital evidence globally.” Across international institutions, data-driven governance has become the norm, with humanitarian agencies and tribunals transforming into “data hubs and information clearinghouses.” This Article critiques the unfettered datafication of global justice by international courts and organizations. These entities have aggressively expanded their data-driven operations …

Challenges In Numerical Simulation Of Frost Heave, Antai Dong, Xiong Zhang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Frost heave of soil extensively exists in northern regions and poses a significant threat to infrastructure in cold regions. Despite over a century of research, challenges persist in numerically simulating frost heave. This study addresses two key issues: (1) What is the primary driving force for liquid water transfer during the freezing process? (2) How can we correctly represent unfrozen water content? Critical insights are derived from the theoretical analysis of coupled hydrothermal migration during soil freezing processes, followed by a case simulation using COMSOL Multiphysics. It concludes that of the water content gradient, suction gradient, and hydraulic gradient, only …

Mars Sample Return Earth Entry System Uncertainty Analysis, Michael D. Squire, Victor Cabrera, Eric Christiansen, Alan Jenkin, Kevin Hoffman, Quincy Mckown, Peter Parker, Glenn Peterson, Bruno Victorino Sarli, William P. Schonberg, Katie Steward, Brian Tulaba, Joel Williamsen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Spacecraft designers and operators use micrometeoroid and orbital debris (MMOD) risk assessments to predict the probability that an MMOD particle impact will cause a critical failure to their systems. An important aspect of MMOD risk and associated requirements is the treatment of uncertainty, often difficult to quantify, or even estimate, for many elements of MMOD risk. This paper describes recent efforts to estimate uncertainties in inputs to the MMOD risk assessment process for a portion of the planned Mars Sample Return (MSR) campaign. The uncertainty bounds developed were used to examine their effect on overall mission MMOD risk.

Identifying Early Warning Signs Of Construction Labor Shortages, Ahmed Shiha, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Construction labor shortages constrain project-level objectives and national development plans. The goal of this study is to utilize the lagged effects of macroeconomic conditions as early warning signs of construction labor shortages. To this end, the authors adopted a methodology, encompassing (1) retrieval of publicly available data and preprocessing of construction labor shortage as the target variable and macroeconomic measures as the explanatory variables, (2) identification of short-term associations between shortages and economic cycles using the Granger causality test, (3) examination of long-term relationships between labor shortages and economic conditions using the Johansen cointegration test, and (4) estimation of the …

Forecasting State-Level Construction Labor Earnings For Enhanced Project Cost Control: An Econometric And Deep-Learning Analysis Of The Leading Economic Indicators, Ahmed Shiha, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

As a major input to several work packages, the labor element constitutes a critical component for successful performance of construction projects. Localized labor shortages, fundamental changes in prevailing wage laws, and historical shifts in the unionization rates of construction workers impair the adequate estimation of construction labor costs in diverse labor market dynamics. Meanwhile, existing studies have utilized national-level indicators to study the trends of construction labor costs, but the relationship between the multifaceted local economic factors and state-level construction labor costs remains understudied. This paper fills such a knowledge gap. A three-stage methodology is adopted: (1) data collection of …

Introduction To Hydroponics- 2025-2026 Workshop Handbook, Stacy A. Adams

Department of Agronomy and Horticulture: Faculty Publications

Hydroponically grown plants grow faster than traditional production systems, with greater productivity, greater palatability, and having optimal visual character. Three principal components of a system include the plant support platform, a nutrient solution reservoir, and an interface for the root-solution. This publication provides in-depth explanation to system design, evaluation of water quality, nutrient formulation, and prototype systems that can be easily constructed for those wanting to explore hydroponics, such as educators, organizational leaders, or home enthusiasts.