Digital Commons Network^™

Mems 411: Automated Assistive Toilet, Alex Scaff, Kenna Mcgahren, Daniel Sibley

Mechanical Engineering Design Project Class

How do we make toilets more accessible for all people - regardless of physical, mental, emotional impediments - while also ensuring simplicity and cost-effectiveness? Utilizing sensors, our toilet device is designed to automatically open and close the toilet lid upon approach, increasing ease of use and general hygiene of the user while being friendly to those who struggle with certain disabilities or impairments.

Mems 411: Adjustable Desk, Catryn Cattoor, Natalia Pilpil, Jamie Burgasser, Adam Wong

Mechanical Engineering Design Project Class

Design and create a desk for a special education classroom of kindergarteners to third graders. The desk needs slanting capabilities, wheel chair accessibility, raising/lower capabilities, distraction prevention capabilities, and light board capabilities. These capabilities need to be configurable for students with different needs. This desk also needs to be very durable, safe, and mobile. The main motivation for this project is the desire to provide the teacher and her students with a single, cost-effective product that is safe, easy to use, and meets their desired needs.

Mems 411: Group V Ball Bearing Sorter, Matthew Hernandez, Sean Huffert, Ethan Delair

Mechanical Engineering Design Project Class

After a semester of hard work, Team V is proud to unveil its finished prototype for the 2024-2025 ASME Student Design Competition. The theme of this challenge was "Assembly Line Sorting and Packaging." The goal of this challenge was to make a device able to satisfy the criteria of sorting between six different bearings of different sizing and material properties, and meeting spatial and time limitations. This device needed to be fast, accurate, compact, and able to sort in bulk. Team V feels like we have met most of these requirements with our final design prototype. For this project, a …

Mems 411: Rc Plane Mount For Cfd Validation, Jake Schwartz, Margot Jay, Ian Torres, Sam Ehrman

Mechanical Engineering Design Project Class

Washington University in St. Louis’ Design/Build/Fly team (WashU DBF) participates in an annual international competition with over 100 teams where they create a Remote Control (RC) plane that can perform various missions. One of the difficulties in developing a plane each year is testing the forces on the plane. Currently, Ansys and XFLR5 are used to create computational fluid dynamics (CFD) models for the plane. CFD modeling simulates air flow over the plane’s wings to analyze how to optimize the aircraft’s aerodynamics. While this is a useful strategy to predict the plane’s theoretical performance, WashU DBF Technical President, Eleni Kambouris, …

Mems 411: Mini Syringe Pump, Rachel Foulk, Braxton Hart, Camilo Hernandez

Mechanical Engineering Design Project Class

In many research and medical settings, small amounts of liquids are dispensed using syringes. Very often, syringe pumps like those shown in the left image, are used to control the amount (i.e., flow rate) of dispensed/collected fluid. There are single- or multi-style syringe pumps; the one shown is single-style; multi-style have 2-8 parallel syringes that are all pushed/pulled at the same flow rate. However, these syringe
pumps are bulky and heavy, making them impractical for many experimental setups. Commercial alternatives include very expensive syringe pumps with remote dispensers. Furthermore, it is often necessary to have two syringe pumps operate in …

National Parks For Future Generations?: The Covid-19 Pandemic’S Impacts On National Parks And Tourism, Colin Cummings '25

Student Research

This paper explores the complex relationship between tourism and the environment in U.S. National Parks, with a focus on the impact of the COVID-19 pandemic. It examines how increased visitation affects wildlife, the spread of invasive species, and the overall health of natural ecosystems. The author argues for a shift in public perception of national parks, emphasizing education, community engagement, and a deeper understanding of the interconnectedness of nature to ensure the preservation of these areas for future generations. The paper also discusses the role of park rangers and historical interpretations of wildlife and the environment, as well as the …

Reflecting Faith In The Heartland: A Study Of The Architecture Of Mainline Protestant Christian Churches In Kalamazoo County, Mi., Ian Russel

Honors Theses

The Midwest is a region with fuzzy borders and an equally confusing place in the American imagination. Is it the last refuge of a more wholesome, innocent America filled with white picket fences or a drab, suffocating post-industrial landscape? Despite largely dominating how the region is depicted in popular culture, neither of these representations is entirely accurate. One possible step towards developing a more accurate understanding of the Midwest is examining the churches that dot its towns and cities. Many of these churches belong to mainline Protestant Christian denominations such as the Evangelical Lutheran Church in America, Presbyterian Church (U.S.A), …

Development Of A Rapid Method For Pfas Detection And Quantitation In Human Hair, Justin M. Allen

Student Theses

In recent years, per- and polyfluoroalkyl substances (PFAS) have emerged as a critical focus in environmental and public health research due to their persistent nature and widespread use in products ranging from non-stick cookware to firefighting foams. These "forever chemicals" resist degradation, posing significant ecological and human health risks. While extensive studies have explored PFAS in environmental matrices, research into their presence in human hair remains limited, with only a handful of studies addressing this biomarker's potential. This thesis aims to develop a robust analytical method for detecting PFAS in human hair, leveraging its unique properties to provide a long-term …

Family Ties: How Families Of Origin And Procreation Influence Women’S Migration And Integration, Becca Goldrup

Undergraduate Honors Theses

Women's migration is an increasingly important focus of interest in understanding the family-level factors shaping individual and family-level migration decisions. Utilizing interviews with 30 immigrant women residing in Utah who migrated to the US at three different ages (childhood, young adulthood, and later adulthood), I ask: “How do familial relationships impact the immigration experience for women in the US, and how does this vary by age at migration?” I find that family significantly shapes women's migration decisions and experiences post-migration for women of all ages, but this influence has subtle differences based on their age at migration. Women who migrated …

Appropriateness Of Ambulatory Antibiotic Prescribing In South Carolina, 2012–2017, Pamela Bailey, Majdi N. Al-Hasan, Julie Royer, Max Habicht, Julie Ann Justo, P. Brandon Bookstaver Pharm.D., Sharon Weissman, Hana R. Winders

Faculty Publications

This population-based cohort study examines the appropriateness of antibiotic prescribing in South Carolina via aggregated pharmacy claims data matched with diagnosis codes from medical claims. Inappropriate antibiotic prescribing decreased from 30.2% in 2012 to 22.6% in 2017 (P < 0.001) and was more common in adults >40 years old.

Delirium Screening Practices For Older Adults In Emergency Departments Across United States: A Scoping Review, Azmat Sidhu, Joy K. Luzingu, Sheneil Agyemang, Arushi M. Chalke, Grace M. Leito, Joseph A. Molina, Zhao Chen, Deborah Jean Mcclelland, Nimit Agarwal, Leah Steckler, Angela Wu

Journal of Geriatric Emergency Medicine

Delirium is commonly missed among older patients in the Emergency Department (ED). Identifying and managing patients with delirium in ED is critical to help improve health outcomes and prevent falls and readmission. There are several validated delirium screening tools but their utilization for assessing delirium in emergency department settings are still under investigation. The overall purpose of this review was to summarize information on current screening practices for delirium among older adults (65 or older) in EDs across United States and to identify current gaps in knowledge and evidence to help inform future research and practice. A comprehensive literature search …

Factors Associated With Receipt Of Tobacco Treatment Integrated With Nurse Navigation In A Centralized Lung Cancer Screening Program At An Urban Academic Medical Center, Christine S. Shusted, Sarah Mukhtar, James Lee, Brooke Ruane, Emily Muse, Lawrence Emeigh-Mcbride, Eboni Gatson-Anderson, Gregory C. Kane, Kuang-Yi Wen, Hee-Soon Juon, Julie A. Barta

Division of Pulmonary, Allergy, and Critical Care Medicine Faculty Papers

PURPOSE: Optimal approaches for tobacco treatment counseling among individuals who currently smoke and are undergoing shared decision-making (SDM) and lung cancer screening (LCS) are unknown. The objective of this cross-sectional study was to determine the rate of reported interest in tobacco treatment counseling and pharmacotherapy among individuals who currently smoke and are receiving integrated nurse navigation for LCS and tobacco treatment in a centralized LCS Program.

METHODS: We identified individuals undergoing SDM through our centralized LCS Program between March 2021 and March 2022. The LCS Program tobacco treatment protocol includes counseling both in-person and via telephone during SDM, LCS results …

Dermoscopy And 30% Potassium Hydroxide Direct Examination As Diagnostic Tools For Distal Lateral Subungual Onychomycosis, Evangelina Lumban Gaol, Eliza Miranda, Sondang Pandjaitan Sirait

Journal of General - Procedural Dermatology and Venereology Indonesia

Background: Culture and histopathological examination are gold standards for diagnosing onychomycosis. However, these examinations are subject to several limitations. Dermoscopy has the potential to become a promising diagnostic tool for onychomycosis. Direct examination of potassium hydroxide (KOH) also has advantages similar to dermoscopy. Knowing the accuracy of both examinations can help clinical decision-making. Our objectives are to assess the diagnostic value of dermoscopy, KOH examination, and their combination for distal lateral subungual onychomycosis compared to culture or histopathology.

Methods: This was a cross-sectional diagnostic study of nails with suspected distal lateral subungual onychomycosis. Sixty nails were included in this study. …

The Relationship Between Religious Coping Styles And Eating Disorder Risk In Christians In A University Setting, Meghan E. Aubuchon

Honors Theses

Existing research on eating disorders and religion is beginning to gain momentum in the present day, but research is lacking on the topic of religious coping and eating disorder risk. This study aimed to investigate the relationship between two known styles of religious coping—positive and negative—and eating disorder risk in University of Mississippi students, faculty, and staff who identify as Christian. A survey consisting of basic demographic questions, the EAT-26, and the Brief RCOPE was distributed via emails sent by the office of IREP to students, faculty, and staff at the University of Mississippi. A total of 330 participants were …

Long-Term Adverse Effects After Electroconvulsive Therapy (Ect): A Narrative Analysis Exploring People’S Experiences, Meaning-Making, And Coping, Emily Shipwright, David Murphy

School of Psychology

Approximately 2500 people receive electroconvulsive therapy (ECT) annually in the United Kingdom; however, there is growing evidence of long-term adverse effects. Few studies have focused on people’s experience of ECT, particularly over the long term. The experience of ECT is known to be complex, requiring qualitative exploration. Therefore, this study aimed to explore the long-term adverse experiences of ECT, including psychological impacts, meaning-making, and coping. Narrative analysis considered thematic, structural, and performative elements of seven people’s stories. Themes were explored across the timeline of participants’ experiences. Before ECT, participants felt misinformed regarding ECT and misunderstood by healthcare professionals. They noticed …

Psychoeducation On Addiction For Healthcare Providers, Lovester Duncan

Walden Dissertations and Doctoral Studies

Summary Walden University College of Nursing This is to certify that the doctoral study by Lovester Duncan has been found to be complete and satisfactory in all respects, and that any and all revisions required by the review committee have been made. Review Committee Dr. Kristina Bohm, Committee Chairperson, Nursing Faculty Dr. Mary Martin, Committee Member, Nursing Faculty Chief Academic Officer and Provost Sue Subocz, Ph.D. Walden University 2024 The DNP project aimed to increase healthcare providers’ knowledge, awareness, and comfort with prescribing medication-Assisted Treatments (MATs). Inadequate treatment and higher overdose and death risks result from providers lacking experience with …

The Free Press Vol. 56, Issue 7, 12-09-2024, Chris Tiner, Cayley Bowman

Free Press, The

Spotlight on USM Neighbors--Promise Scholar Ornaments--Student Election Talk--Why You Should Have a Signature--Practicing Rest--A Night at the Opera--Goat's Milk and Cookies--Just Keep Running

Hospital Location, Socioeconomic Factors, And Obesity Impact On Patient Readmission Rates 30 Days Post-Coronary Artery Bypass Graft, Mazalo Looky

Walden Dissertations and Doctoral Studies

Coronary artery bypass graft (CABG) is associated with a high rate of readmissions within 30 days after discharge. Patient variables such as obesity and socioeconomic status (SES) are modifiable, whereas hospital factors such as location indicate the need for a better regional needs assessment. The purpose of this study was to examine the impact of hospital location, SES, and obesity (independent variables) on the 30-day readmission rate post-CABG (dependent variable) among US patients. Secondary data sets available from the Centers for Medicare & Medicaid Services and the Society of Thoracic Surgery websites were analyzed to assess the impact of location, …

The Role Of Equity Leaders In Implementing The Community School Policy Framework In California, Iris Zuniga

LMU Theses and Dissertations

This study explored the role of Equity Leadership in implementing the Community School Policy Framework in California, focusing on addressing systemic inequities. Using a qualitative approach, this research drew on six in-depth interviews with public sector leaders in the California Community School Partnership Program (CCSPP). Findings underscored the critical importance of equity-focused leadership, intentional collaboration, and data-driven accountability in advancing equitable practices within the community school model. The research highlighted that effective implementation of the framework depends on tailoring strategies to California’s unique community needs and centering on under-resourced students. Fostering cross-sector partnerships and actively engaging community partners were essential …

Libraries On The Front Lines: The Imperative For Disaster-Ready Information Professionals, Feili Tu-Keefner Ph.D.

Faculty Publications

Libraries, particularly local public libraries, have evolved into hubs for community-first services, extending beyond traditional roles. Library personnel are now expected to act as first responders and crisis leaders during times such as natural disasters. This report documents the critical crisis leadership qualifications required for library personnel, identified through comprehensive research from 2015 to 2023. Findings from these situation-specific case studies call attention to the community’s needs for library services during emergencies, underscoring the requirement for LIS education to include disaster management. Continuing education (CE) is also critical in preparing information professionals for these essential roles.

Rare Breast Cancers Review, Bowen Song, Harnoor Singh

Faculty, Staff and Student Publications

Background/objectives: Breast cancer is one of the most common malignancies in women, with rare subtypes presenting unique clinical challenges. This review provides a comprehensive analysis of rare breast cancers, including both epithelial and non-epithelial subtypes, and explores their epidemiology, pathology, prognosis, and treatment approaches.

Methods: A systematic review was conducted focusing on recent advancements in the treatment of rare breast cancer subtypes. Articles were selected based on criteria emphasizing studies from the past five years, with older foundational studies included where necessary. The analysis incorporated molecular profiling, clinical trials, and advancements in targeted and immunotherapies, where possible.

Results: Rare epithelial …

On The Benefits Of Directness In Virtual Characters For Motivational Interviews, Michael O'Mahony, Cathy Ennis, Robert Ross

Conference papers

Understanding the factors influencing successful engagement with Embodied Conversational Agents (ECAs) remains a significant challenge. This understanding could be used to personalise agents to users to improve interactions. Some studies have shown that simulating personalities in healthcare agents can improve effectiveness and engagement. However, it is not yet well understood how variations of agent personality can be leveraged to improve user engagement with Motivational Interviewing (MI) ECAs. Specifically how the balance between agent warmth and directness can be controlled in an MI agent to improve likeability and engagement. We conducted an online Wizard-of-Oz (WoZ) mediated study of two variants of …

Microstructured Microstructure: Effects Of Concentration Variations On Shock Initiation Of Hmx-Based Plastic Explosives, Dana D. Dlott, Lawrence Salvati, Siva Kumar Valluri

Mechanical and Aerospace Engineering Faculty Research & Creative Works

We studied shock-compressed plastic-bonded explosives (PBX) consisting of HMX (cyclotetramethylene-tetranitramine) with PDMS (poly-dimethylsiloxane) binder, where we varied the HMX weight percent (wt%) up to a maximum of 60 wt%. In this lower-concentration regime, HMX particle clustering causes the PBX structure to consist of HMX clusters and PDMS islands. Structural analysis by optical microscopy allowed us to compute a radial correlation function that gives the mean distance from an average HMX particle to the nearest polymer island. Short-duration 20 GPa shocks (4 ns) created hot spots, and time-resolved thermal emission was used to obtain the growth rate of the subsequent deflagration. …

Accelerating Shock-Driven Reactions In Metal Nanocomposites, Siva Kumar Valluri, Edward L. Dreizin, Dana D. Dlott

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Metal powders are sought as energetic additives to conventional explosives. However, due to their sluggish reaction kinetics with external gaseous oxidizers, pure metals are replaced with metallic composites with intimately mixed condensed phase oxidizers prepared by arrested reactive milling (ARM). Such composites can be initiated by non-thermal, mechanical means; through shear mixing of fuel and oxidizer under a shock compressive load. Since the ARM preparatory technique allows for tuning multiple powder attributes such as fuel/oxidizer of interest, their degree of mixing, amount of oxidizer, particle porosity, among others, a parametric study is crucial in identifying suitable traits for fast reactions …

Hyperspectral Imaging For Temperature Measurements Of Hot Spots In Shocked Plastic-Bonded Explosives, Dhanalakshmi Sellan, Siva Kumar Valluri, Dana D. Dlott

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Hot spots are formed when energetic microstructures are shocked, and they play a critical role in shock sensitivity. It is important to know both the time-dependent size and temperature of the hot spots, in order to generate a kinetic model to describe reaction growth in plastic-bonded explosives (PBX). Here we use a recently developed technique where PBX is fabricated in the form of a thin wafer, embedded within a transparent polymer binder, and shocked with a laser-launched flyer plate that produces pressures of about 30 GPa range. In this method, every crystal of the cyclotetramethylene-tetranitramine (HMX)-based PBX can be observed …

Analyzing Social And Cultural Expectations For Women In The 20th Century Through The May Day Festival At Depauw University, Megan Mcclaren '25

Student Research

This paper analyzes the May Day festival at DePauw University as a lens through which to understand the social and cultural expectations for young women in the 20th century. By examining the festival's history, activities, and the roles of various student organizations, the study explores how broader historical events such as wars and economic changes, as well as societal ideals influenced the festival's evolution. The research is based on primary sources, including university archives and student-created pamphlets and photographs, in an effort to bring attention to a forgotten, yet important, part of DePauw University's history and the contributions of the …

Interventions For Aboriginal And Torres Strait Islander People With Type 2 Diabetes That Modify Its Management And Cardiometabolic Risk Factors: A Systematic Review, Ciying Tan, Zoe Williams, Mohammad Ashraful Islam, Ray Kelly, Tuguy Esgin, Elif I. Ekinci

Research outputs 2022 to 2026

Objectives: To review studies of interventions for reducing the impact of type 2 diabetes in Aboriginal and Torres Strait Islander people. The primary aim was to review and summarise the characteristics and findings of the interventions. The secondary aims were to assess their effects on diabetes and cardiometabolic risk factors, and the proportions of people with type 2 diabetes who achieved therapeutic targets with each intervention. Study design: We searched eight electronic databases for publications of studies including Aboriginal or Torres Strait Islander people aged 15 years or older with diagnoses of type 2 diabetes, describing one or more diabetes …

The Role Of Dna Topoisomerases In The Completion Of Dna Replication, Parisa Mokhtari

Dissertations and Theses

Accurate replication of the genome is essential to maintain cellular life. Completing DNA replication on the chromosome is central to this task and involves several enzymes, including RecBCD, RecG and SbcCD-ExoI, which process, join, and resolve the two convergent replication forks. This event is certain to generate a number of structural complexities involving supercoiling, tangles and knots as the two DNA replication forks converge which must be resolved to maintain the integrity of the genome. Structural knots and tangles generated during DNA replication, transcription and segregation are typically resolved by DNA topoisomerases. E. coli encodes four DNA topoisomerases--two type I …

Automated Segmentation Of Mri White Matter Hyperintensities In 8421 Patients With Acute Ischemic Stroke, Hosung Kim, Wi-Sun Ryu, Dawid Schellingerhout, Jonghyeok Park, Jinyong Chung, Sang-Wuk Jeong, Dong-Seok Gwak, Beom Joon Kim, Joon-Tae Kim, Keun-Sik Hong, Kyung Bok Lee, Tai Hwan Park, Jong-Moo Park, Kyusik Kang, Yong-Jin Cho, Byung-Chul Lee, Kyung-Ho Yu, Mi Sun Oh, Soo Joo Lee, Jae-Kwan Cha, Dae-Hyun Kim, Jun Lee, Man Seok Park, Hee-Joon Bae, Dong-Eog Kim

Faculty, Staff and Student Publications

Background and purpose: To date, only a few small studies have attempted deep learning-based automatic segmentation of white matter hyperintensity (WMH) lesions in patients with cerebral infarction; this issue is complicated because stroke-related lesions can obscure WMH borders. We developed and validated deep learning algorithms to segment WMH lesions accurately in patients with cerebral infarction using multisite data sets involving 8421 patients with acute ischemic stroke.

Materials and methods: We included 8421 patients with stroke from 9 centers in Korea. 2D UNet and squeeze-and-excitation (SE)-UNet models were trained using 2408 FLAIR MRIs from 3 hospitals and validated using 6013 FLAIR …

Examining The Effects Of Language Barriers For Non-Native English Speakers In The Healthcare System In Northwest Ohio, Sarah Witt

Honors Projects

Hundreds of thousands of people in the state of Ohio speak a language other than English, and communication in a predominantly English-speaking state can prove not only cumbersome, but dangerous as well. Patients who have difficulties communicating with their healthcare providers experience higher rates of medical error, adverse medical reactions because of improper drug use, longer hospital stays, and more hospital readmissions than the general population. Additionally, they experience high rates of anxiety and frustration when receiving medical care, which causes resentment and mistrust of the healthcare system. This study investigated language barriers in healthcare systems across Northwest Ohio by …