Digital Commons Network^™

Establishing Performance Criteria For Evaluating Watershed-Scale Sediment And Nutrient Models At Fine Temporal Scales, Aayush Pandit, Sarah Hogan, David Tyler Mahoney, William I. Ford, James F. Fox, Christopher Wellen, Admin Husic

Civil Engineering Faculty Publications

Watershed water quality models are mathematical tools used to simulate processes related to water, sediment, and nutrients. These models provide a framework that can be used to inform decision-making and the allocation of resources for watershed management. Therefore, it is critical to answer the question “when is a model good enough?” Established performance evaluation criteria, or thresholds for what is considered a ‘good’ model, provide common benchmarks against which model performance can be compared. Since the publication of prior meta-analyses on this topic, developments in the last decade necessitate further investigation, such as the advancement in high performance computing, the …

An Approach To Quantifying The Lifecycle Sustainability Impacts Of Tungsten Carbide Tools, Gatewood Arnold, Julian Polizzi, Syed Ibn Mohsin, Daniel Carnesi, Julius Schoop, Fazleena Badurdeen

Mechanical Engineering Faculty Publications

Tungsten carbide cutting tools are widely used for their high machining performance and low cost. However, their cost does not currently reflect the material rarity, environmental costs, nor societal costs associated with their production. Critically, embodied energy makes a sizeable contribution to the total lifecycle energy consumption. This study quantifies the true triple bottom line cost of the tools with respect to established sustainability metrics by leveraging cross-disciplinary insights from the product, process, and system levels. Based on the adjusted cost, a comparative analysis of the cutting tool sustainability on the profitability of a nickel-based superalloy machining process was carried …

A Multi-Scale Finite Element Method For Investigating Fiber Remodeling In Hypertrophic Cardiomyopathy, Mohammad Mehri, Kenneth S. Campbell, Lik Chuan Lee, Jonathan F. Wenk

Mechanical Engineering Faculty Publications

A significant hallmark of hypertrophic cardiomyopathy (HCM) is fiber disarray, which is associated with various cardiac events such as heart failure. Quantifying fiber disarray remains critical for understanding the disease’s complex pathophysiology. This study investigates the role of heterogeneous HCM-induced cellular abnormalities in the development of fiber disarray and their subsequent impact on cardiac pumping function. Fiber disarray is predicted using a stress-based law to reorient myofibers and collagen within a multiscale finite element cardiac modeling framework, MyoFE. Specifically, the model is used to quantify the distinct impacts of heterogeneous distributions of hypercontractility, hypocontractility, and fibrosis on fiber disarray development …

Effect Of Walking With An Active Ankle Exoskeleton On The Biomechanical Responses Of The Lumbar Spine, Jose E. Rubio, Junfei Tong, Aravind Sundaramurthy, Anup Pant, Sridevi Nagaraja, Meredith K. Owen, Michael A. Samaan, Brian W. Noehren, Jaques Reifman

Physical Therapy Faculty Publications

Objective: Musculoskeletal injuries pose a health threat to U.S. Service members. In particular, the physical demands of walking and running with load carriage contribute to a high incidence of musculoskeletal injuries of the lower back. Active ankle exoskeleton devices are promising technologies that may help mitigate the impact of load carriage on the incidence of these injuries. However, the safe extended use of these devices requires an understanding of their beneficial or detrimental effects on the lumbar spine. In this pilot study, we investigated the impact of walking with an ankle exoskeleton device on lumbar biomechanical responses.

Methods: We collected …

The Role Of Cooperative Extension In Community Development: A Study Of Success Stories And Leadership Practices, George Grant

Theses and Dissertations--Educational Leadership Studies

The Cooperative Extension System (CES) plays a vital role in community education and development across the United States. CES agents and specialists work directly with community members to identify needs, mobilize existing assets, and empower action. Despite the overlap in the fields of CES and community development, few studies have systematically analyzed the specific practices used by extension personnel who act as facilitators of change within communities. To address this gap in knowledge, a qualitative study was conducted using directed content analysis of CES success stories published through the University of Kentucky to identify practices used among two integral positions …

Path-Goal Leadership Dynamics In Advanced Manufacturing Dual Credit Career And Technical Education (Cte) Classrooms In Connecticut, Kyle R. Pepin

Theses and Dissertations--Educational Leadership Studies

This dissertation examined the adaptive instructional leadership practices of instructors teaching dual credit career and technical education (CTE) classes in Connecticut, particularly in advanced manufacturing technologies (AMT). The study drew on survey responses from a broader group of course instructors and a purposeful sample of six instructors and six adult students who participated in semi-structured interviews. All instructors taught dual credit classes in partnership with Connecticut State Community College in hands-on manufacturing, engineering, or similar workshop environments designed to prepare high school aged students for careers and develop practical, job-ready skills in settings that closely replicate industry conditions. This under-researched …

From Engagement To Clarity: Understanding Career Exploration Activities And Their Influence On Career Clarity Among High School Students, Odunayo O. Omotilewa

Theses and Dissertations--Education Sciences

This study examined the associations between career exploration activities and career clarity among high school students in the U.S.A. Using data from the 2022 Program for International Student Assessment, collected from a national sample of 15 to 16-year-olds across 154 schools, the researcher first identified student and school factors associated with engaging in career exploration. The study then examined the influence of these activities on career clarity. Specifically, the analysis focused on internships, job shadowing, job fairs, career counseling, completing career questionnaires, researching careers and colleges online, attending college tours, and financing information, and on the level of engagement in …

Implementation Of Project-Based Instruction In Statistics Higher Education Courses, Jennifer A. Daddysman

Theses and Dissertations--Education Sciences

Project-based instruction is an instructional methodology based in constructivism that aligns with recommendations from the American Statistical Association for teaching statistics, including incorporating real-world data and examples, collaboration, and scaffolding (GAISE College Report ASA Revision Committee, 2016; GAISE Steering Committee, 2024; Krajcik & Blumenfeld, 2005; Tishkovskaya & Lancaster, 2012). This study examined current use of project-based instruction in United States higher education courses in statistics and the supports for and challenges to implementing this type of instruction.

This study used qualitative research methodology in the integrative pedagogy and diffusion of innovation frameworks. Voluntary response surveys were distributed via two sections …

Growing An Inquiry Practice: A Case Study Of Teacher Change In Social Studies Classrooms, Alicia Michelle Saccomanno

Theses and Dissertations--Education Sciences

This exploratory case study examines how a group of social studies teachers refined their inquiry-based instructional practices over a school year. Research questions included: 1. How do teachers grow their use of questions, tasks, and sources? 2. What obstacles do teachers face when implementing inquiry? How do they work to overcome those obstacles? 3. How do teachers learn to trust the inquiry process, trust themselves to implement it, and trust their students to collaborate, deliberate, and produce meaningful work? This study examined teachers' design and instructional choices as well as their responses to student outcomes …

Examining How Well High School Geometry Students Learn Concepts Of Three-Dimensional Figures Using A Project-Based Instructional Strategy, Lenora A. Mcgrath

Theses and Dissertations--Education Sciences

This paper examines how well the introduction of an integrated approach, namely, Project-based Instruction (PBI), which uses real-world contexts to investigate problems, leads to improved academic performance and student motivation in a 9^th Grade Geometry class studying three-dimensional figures and their properties. The experimental group worked through the researcher-designed unit that included mini-lessons, six benchmark lessons, and the design and creation of a final product to address the driving question of the unit. The comparison group experienced a normative teaching strategy designed by the classroom teacher. An explanatory sequential mixed methods design was chosen for the proposed study to …

Recipient Experiences Of Donor-Funded College Scholarships: “I Don't Know What You Want To Know About Me. I Don't Know What I Know About You.”, Teresa Waddle Gotthardt

Theses and Dissertations--Educational Policy Studies and Evaluation

This qualitative study explores the experience of receiving donor-funded scholarship support facilitated through a higher education institution, especially when the recipient has interacted with the donor of the funding. This recipient-and-donor-interaction is common at American post-secondary institutions in the form of written thank you notes and attendance at donor recognition events. This research addressed the following questions: How do donor-funded scholarship recipients experience this funding? How do donor-funded scholarship recipients experience interaction with the donor of the scholarship? These questions were explored through in-depth semi-structured interviews with 23 recent alumni from five private universities and colleges who received donor-funded scholarships …

Investigating The Psychometric Properties Of A Set Of Local Stem Literacy Instruments In Rasch Model, Lijun Shen

Theses and Dissertations--Educational Policy Studies and Evaluation

This study investigates the psychometric features of the See Blue STEM literacy inventories (SBSTEMs, including the elementary version SB-E and the middle school version SB-M) to determine their validity in measuring STEM literacy. Using data from elementary and middle school students participating in the See Blue STEM camp in 2019 and 2021-22, this research employed the Rasch Partial Credit Model (PCM) to analyze item-level performance and identify DIF items across various demographic subgroups (race, gender, free-lunch status, and potential first-generation status) and camp delivery modes (online versus in-person). Results indicated that both the elementary (SB-E) and middle school (SB-M) versions …

From Ads To Enrollment: Understanding How Targeted Marketing Affects College Choice, John W. Roberts

Theses and Dissertations--Educational Policy Studies and Evaluation

The purpose of this qualitative study is to explore the perceived impact of targeted marketing on college choice. Research on college choice is an established area of scholarship that explores the variables that are at work when a student chooses to attend a college or university. Given that the enrollment landscape for higher education continues to be competitive, colleges and universities are doing what they can to “stand out” among the competition in a crowded marketing and advertising space. And, as technology improves, segmenting and personalizing marketing to reach the right students at the right time is becoming more commonplace …

Understanding High School Students’ Identities In Stem Through Video Elicitation, Andrea N. Perrin

Theses and Dissertations--Science, Technology, Engineering, and Mathematics (STEM) Education

Understanding how high school students develop their STEM identities is essential for creating inclusive and engaging learning environments that foster persistence in STEM fields. This qualitative study explores the experiences of high school seniors in an engineering capstone course within a diverse Midwestern high school, utilizing video elicitation as the primary research method. Through video interviews, transcript reviews, and thumbnail selections, students provided firsthand insights into their evolving STEM identities, sense of belonging, and the factors influencing their persistence in engineering.

Findings reveal that social interactions, autonomy in learning, hands-on experiences, and real-world applications of engineering concepts shape students' STEM …

Examining The Professional Noticing Skills, Attitudes Toward Mathematics, And Elementary Math Content Knowledge Of Preservice Elementary School Teachers Through The Noticing Numeracy Now Intervention, Johnathan T. Rogers

Theses and Dissertations--Science, Technology, Engineering, and Mathematics (STEM) Education

Abstract: This quasi-experimental study examined the impact of the Noticing Numeracy Now intervention, an intervention focused on professional noticing of children’s conceptual development in whole number and arithmetic reasoning, on preservice elementary teachers’ professional noticing skills, attitudes toward mathematics, and elementary math content knowledge. This study was based off of a previous study and intervention created by Molly Fisher, Jonathan Thomas, Edna Schack, Cindy Jong and Janet Tassell. This study used a video-based professional noticing module, consisting of four lessons, situated in the pedagogies of practice framework. Within this study, 10 students (all preservice elementary teachers) at Kentucky State University …

Investigation Of Subsurface Thermal Radiation Phenomena In Fibrous Thermal Protection Systems, Colby L. Gore

Theses and Dissertations--Science, Technology, Engineering, and Mathematics (STEM) Education

Atmospheric re-entry induces intense thermal stress upon vehicles through a high-enthalpy boundary layer that encompasses the craft. To protect these vehicles, numerous insulative methods, known as thermal protection systems (TPS), are deployed to protect the craft during re-entry. The TPS materials insulate the craft from intense thermal transmission that would terminate a mission. In hypersonic environments, vast temperature gradients exist, enforcing the exponential effect of thermal radiation. However, TPS materials are commonly low-density fibrous materials that allow for the potential to be penetrated by thermal radiation. A series of arc-jet tests was completed to replicate enhanced radiative conditions in a …

Black Women, Bold Science: Navigating Race, Gender, And Identity In Science, Mia L. Brown

Theses and Dissertations--Science, Technology, Engineering, and Mathematics (STEM) Education

This research study examines the challenges Black women encounter when in predominantly white, male academic and professional science settings, where they experience dual discrimination because of their race and gender. These biases perpetuate the negative stereotype that Black women are less competent than white men. This mixed methods study examines how Black women navigate their race, gender, and science identities within predominantly white institutions through their doctoral programs and professional science careers. The study implements Critical Race Mixed Methodology to combine survey data for a wide reach with interview data for detailed exploration. The study involved eight Black women science …

Designing An Undergraduate Opera Workshop Curriculum For Universities, Christopher L. Burchett

Theses and Dissertations--Music

The world of opera is quickly evolving to keep pace with the other arts forms of film, television and Broadway theater. For many years the genre had been reluctant to change with the times and update the skills of their performers. Those days have passed. Today’s operatic performers must be better actors, better movers and more theatrically efficient with their overall skill set in addition to having the secured singing technique that has for so long been the top priority. Universities must take ownership of this training.

Today’s university opera workshop programs must be more than they have been in …