Digital Commons Network^™

Unbalanced Circulating Current Injection Control Of Three‑Phase Mmc, Yufei Yue, Luhang He, Libang Wang, Yawen Zhang

Journal of Electric Power Science and Technology

Modular multilevel converters (MMCs) have the problem of three-phase internal power imbalance, which easily leads to the damage of system stability and the increase of system loss. To address internal power imbalance of MMCs, this paper analyzes this problem and proposes a control method based on the injection of positive and negative sequence circulating current. The proposed method mainly includes four parts: the extraction of positive and negative sequence circulating current; the calculation of circulating current command value; the calculation of the number of input sub-modules; the acquisition of trigger signal. By injecting the extracted positive and negative sequence circulating …

Vibration Characteristics And Signal Inversion Of Oil‑Immersed Transformer Based On Electromagnetic‑Structural Field, Feng Huang, Chun Guo, Bingbing Qiu, Xiaodan Qiu, Yi Yang, Fating Yuan, Ruiqing Ji

Journal of Electric Power Science and Technology

As critical equipment in the power system, the operation status of oil-immersed transformers directly affects the safety and stability of the power grid. Based on COMSOL, a finite element simulation software, a 10kV/400V oil-immersed transformer electromagnetic–structural multiphysics coupling calculation model is established to analyze the effect of added/unadded clamping devices on the core vibration displacement. On this basis, the vibration characteristics of the core, windings, and tank wall are analyzed, and their corresponding vibration acceleration signals are extracted. Subsequently, the Kendall and Spearman correlation coefficients are employed to calculate the correlation among the vibration signals of the core, windings, and …

The Relationship Between Food Label Comprehension And Consumer Dietary Choices, Marline Denis

Walden Dissertations and Doctoral Studies

Poor dietary choices and limited understanding of nutritional information are ongoing public health concerns that contribute to the rise of chronic illnesses such as obesity, diabetes, and heart disease. This quantitative, cross-sectional, correlational study investigated the associations between health literacy and food label comprehension with consumer dietary choices and adherence to dietary guidelines among individuals aged 16 and older in the United States. Guided by the Nutrition Label Literacy (NLL) framework, this study explored whether components such as basic nutritional knowledge, numeracy skills, health motivation, and label usage predict healthier food choices. Age, education, and gender were included as covariates. …

Strategic Planning Processes For Profitability And Sustainability Of Small Restaurants In Alberta, Olufemi Oluwasanu Baiyewun

Walden Dissertations and Doctoral Studies

Some small restaurant managers struggle to develop and implement strategic planning processes to achieve profitability and sustainability. As customer attendance declines, these managers face economic challenges and reduced daily sales, often stemming from inadequate strategic planning that could support sustained profitability and long-term success. Grounded in resource-based view theory and dynamic capability theory, the purpose of this qualitative multiple case study was to explore the successful strategic planning processes that small restaurant business managers in Alberta, Canada, use to achieve profitability and sustainability beyond 5 years. The participants were six small restaurant managers who successfully implemented strategic planning processes to …

Cognition And Behavior In Neurofibromatosis Type 1: Report And Perspective From The Cognition And Behavior In Nf1 (Cabin) Task Force, David H Gutmann, Corina Anastasaki, Aditi Gupta, Yang Hou, Stephanie M Morris, Jonathan M Payne, Jacob Raber, Seth M Tomchik, Linda Van Aelst, James A Walker, Kaleb H Yohay

2020-Current year OA Pubs

Individuals with neurofibromatosis type 1 (NF1) are prone to the evolution of neurodevelopmental symptomatology including motor delays, learning disabilities, autism, and attention deficits. Caused by heterozygous germline mutations in the

A Novel Approach To Treat Trastuzumab Resistant Her2+ Breast Cancer: Activation Pkcδ, Maria Grazia Mejia Monroy

Master's Theses

In the United States, approximately one in eight women will be diagnosed with invasive breast cancer in her lifetime and one in forty will die from breast cancer. From among all the different subtypes of breast cancer, HER2+ can be found in approximately 20% of breast cancer tumors. HER2 overexpression has been associated with an aggressive form of breast cancer, increasing the risk of metastasis or recurrent tumors in 50% of patients. The standard of care for HER2 positive breast cancer, trastuzumab, has been effective for some patients; however, others develop resistance over time, leading to disease progression and metastasis. …

Transition To Organic: Alfalfa Production In Utah, Earl Creech, Ryan Larsen, Marion Murray, Jennifer R. Reeve, Michele Schahczenski

All Current Publications

Transitioning to organic production may not require drastic operational changes on the part of the producer, as alfalfa production lends itself to more organic practices by default. Producers may decide to transition to certified organic production to capture organic price premiums, access niche market opportunities, reduce the use of synthetic inputs, meet growing consumer demand, enact personal values around environmental stewardship, and support soil and biodiversity conservation. Whatever a grower’s motivation, this fact sheet covers transitioning to organic production through understanding organic production systems, the National Organic Program (NOP) regulations, and crop-specific considerations.

The Ecology Of Gender-Based Violence For Syrian Refugee Women In Tripoli And Akkar, Dima Masoud

Dissertations and Theses

Lebanon is a country that suffers from multiple economic, political, and health crises. Additionally, the mass displacement of Syrian refugees to Lebanon after the war in Syria over a decade ago has left Syrian refugees vulnerable, including the vulnerability of Syrian refugee women to gender-based violence (GBV). While these conditions have affected all of Lebanon, this dissertation focuses on the regions of Tripoli and Akkar in northern Lebanon. Tripoli and Akkar are regions that border Syria, which means that an influx of Syrian refugees, mostly unregistered, comes in. While other regions in Lebanon also border Syria, Tripoli and Akkar are …

Distribution And Habitat Use Of Sounders Gray Whales From 1990 To 2023, Sara N. Mach

Honors Projects

Abstract: Every spring, a small subgroup of gray whales (Eschrichtius robustus), referred to as “Sounders,” migrate to northern Puget Sound (NPS), Washington State, to forage on small crustaceans, particularly during years of low prey availability in the Arctic, the primary foraging habitat for gray whales. In contrast to gray whales in other locations, Sounders primarily forage on ghost shrimp (Neotrypnea californiensis) while in NPS. These small crustaceans live in the sediment in the intertidal to shallow subtidal zones, so gray whales must wait for higher tides to feed. Gray whale abundance in NPS and time spent …

Spectator 2025-06-05, Editors Of The Spectator

The Spectator

No abstract provided.

Clinical Practice Guideline For Systemic Lupus Erythromatosus And Lupus Nephritis, Seleaina A. Thomas

Walden Dissertations and Doctoral Studies

Summary This project addressed the critical practice problem of delayed and inaccurate diagnosis of systemic lupus erythematosus (SLE), which has been linked to increased morbidity and mortality, particularly among marginalized populations. These diagnostic challenges have been recognized globally, with international research highlighting inconsistencies in care and the absence of standardized guidelines. Implementing inclusive and equitable clinical practice guidelines (CPGs) that consider social determinants of health, political determinants of health and actively involve diverse populations in research can play a crucial role in reducing racial disparities and improve outcomes for all lupus patients. Thus, the development of a CPG focused on …

Evaluating The Gomath! Curriculum For Supporting Middle School Students' Mathematics Learning, Janet J. Muckerheide

Walden Dissertations and Doctoral Studies

The problem addressed in this study was that the GoMath! curriculum implemented in 2016 by St. Anne Middle School’s (a pseudonym) administration to support Grades 6-8 student mathematics learning had not been evaluated to determine its effectiveness. Guided by Stufflebeam’s context, input, process, and product (CIPP) evaluation model, the purpose of this project study was to evaluate if the GoMath! curriculum was effective in supporting Grades 6-8 students’ mathematics learning. This program evaluation assessed the curriculum across four CIPP dimensions: context (alignment with standards), input (teacher support and professional development [PD]), process (student engagement), and product (academic outcomes). Document analysis …

On Closed-Form Preintegration For A Class Of Mixed-Invariant Systems In Seₙ(3), Li-Yu Lin, Kartik A. Pant, Benjamin Perseghetti, James Goppert

School of Aeronautics and Astronautics Faculty Publications

A large class of nonlinear systems in engineering and robotics evolves on geometric manifolds, such as fixed-wing aircraft, quadrotors, etc., whose kinematic motion can be described using Lie groups, in particular SEn(3) . The existing techniques involve numerical integration methods such as Runge-Kutta integration to propagate their motion forward in time. However, these methods are approximate solutions and do not respect the geometric constraints of the nonlinear differential equation, leading to higher computational costs and numerical integration errors. To this end, we propose a geometric closed-form approach to solve the initial value problem for a class of nonlinear systems that …

Why Would I Befriend A Bot? Assessing Factors Influencing The Usage Of Social Chatbots For Digital Natives, Mohammad Amin Kuhail, Jihene Mrabet, Rafiq Hijazi, Justin Thomas

All Works

With advancements in artificial intelligence (AI), social chatbots (SCs) can now simulate meaningful, sympathetic interactions that blur the line between human and machine connection while also providing social and emotional support to its users. Generation Z (Gen Z), as tech-savvy digital natives, prefers individualized and emotionally engaging digital interactions, making them an important demographic for the adoption of AI-powered SCs. This study investigates the factors influencing Gen Z's use of SCs, focusing on emotional support, attitudes towards AI, loneliness, and hedonic motivation. The study employed a quantitative survey with 156 participants who interacted with an SC and completed a questionnaire …

Exploring The Figured Worlds And Identity Of Religious Women In Mathematics-Related Majors, Rachel K. Reynolds

Undergraduate Honors Theses

This thesis investigates how religious women in mathematics construct and navigate their identities within the intersecting figured worlds of gender, religion, and mathematics. Drawing on Holland et al.’s (1998) theory of figured worlds and informed by identity theory, this study examines how these women experience, negotiate, and position their identities within these figured worlds. Through interviews with women who are simultaneously committed to religious life and mathematical scholarship, the research reveals that rather than perceiving conflict between these domains, participants often find points of integration and mutual reinforcement. Their narratives illuminate how identity is shaped through cultural contexts, institutional expectations, …

Global Tracking Of Marine Megafauna Space Use Reveals How To Achieve Conservation Targets, Ana M.M. Sequeira, Jorge P. Rodríguez, Sarah A. Marley, Hannah J. Calich, Mirjam Van Der Mheen, Michelle Vancompernolle, Lucy M. Arrowsmith, Lauren R. Peel, Nuno Queiroz, Marisa Vedor, Ivo Da Costa, Gonzalo Mucientes, Ana Couto, Nicolas E. Humphries, Sara Abalo-Morla, Scott R. Benson, Scott A. Shaffer, For Full Author List, See Comments Below

Faculty Research, Scholarly, and Creative Activity

The recent Kunming-Montreal Global Biodiversity Framework (GBF) sets ambitious goals but no clear pathway for how zero loss of important biodiversity areas and halting human-induced extinction of threatened species will be achieved. We assembled a multi-taxa tracking dataset (11 million geopositions from 15,845 tracked individuals across 121 species) to provide a global assessment of space use of highly mobile marine megafauna, showing that 63% of the area that they cover is used 80% of the time as important migratory corridors or residence areas. The GBF 30% threshold (Target 3) will be insufficient for marine megafauna’s effective conservation, leaving important areas …

Unraveling The Enigma Of Classification Of Synthetic And Genuine Information Using Machine Learning And Explainable Ai, Vishnu S. Pendyala

Faculty Research, Scholarly, and Creative Activity

There is a preponderance of AI-generated text everywhere today. Literature shows that there has been considerable success in detecting such text. This paper uses explainable AI (XAI) techniques to get insights into the workings of the machine learning models used to classify synthetic text. In detecting such text, this work analyzes synthetic and genuine information from visualization and explainability perspectives. The text is converted into vector embeddings using Robustly Optimized BERT Pretraining Approach (RoBERTa). Variational Autoencoders (VAEs) are used for visualization and Support Vector Machine (SVM) is used for classification. Local Interpretable Model-Agnostic Explanations (LIME), SHapley Additive exPlanations (SHAP), and …

Large Language Models For Quantitative Analysis Of Statutory Stringency And Its Correlation With Sexual Assault Crime Rates, Samhita Konduri, Vishnu S. Pendyala

Faculty Research, Scholarly, and Creative Activity

Sexual assault (SA) crimes are among the most important issues for our current society to solve, with these crimes in particular having long-term consequences on victims and their communities. To solve this issue, one approach is to make laws and penalties for these crimes stricter. However, there have not been any studies on the relationship between stricter penalties and lower crime rates, especially about SA crimes, in a quantitative manner. The biggest barrier to conducting a quantitative study on the strictness of laws and statutes is the lack of a standardized measure of how strict a legal text is. This …

Improving Follow-Up Adherence: A Case Study On Patient Experience Initiatives, Aaron Haley

Walden Dissertations and Doctoral Studies

Patient-centered care has become increasingly paramount in healthcare organizations (Thummak et al., 2023). A critical component of this model is patient adherence to scheduled appointments, as missed visits can negatively affect outcomes (Halladay et al., 2019), increase healthcare costs, waste resources, and disrupt workflow (Low et al., 2023). This qualitative case study investigated the factors contributing to patient nonadherence to scheduled visits in a multidisciplinary behavioral health organization (BHO) in the Southwestern United States. The study utilized data from the behavioral health leader (BHL), organizational records, and secondary sources and was guided by the Baldrige Framework of Excellence as its …

Business Sustainability Strategies Used By Small- And Medium-Sized Enterprise Owners In The Nigerian Hotel Industry, Victor Robert Uko

Walden Dissertations and Doctoral Studies

Some small and medium-sized enterprise (SME) owners in the hotel industry face survival challenges during economic downturns, such as the coronavirus disease (COVID-19) and the 2016 oil glut crisis. SME hotel owners are concerned about addressing these challenges to ensure profitability and sustainability amid economic crises. Grounded in the resource-based view theory, the purpose of this qualitative pragmatic inquiry was to explore strategies SME hotel owners used to maintain business success amid economic crises. The participants were six SME hotel owners in Nigeria who had implemented strategies to remain profitable and sustainable. Data were collected through semistructured interviews and a …

Development Of Antimicrobal Formulations From Natural Extracts And Silver Nanoparticles, Ellen Hoey, Lily Jaiswal, Shiv Shankar

Level 3

No abstract provided.

A Case Study Of An Instructional Design Model For Creating Scalable Courses In Healthcare, Zoaib Mirza

Theses and Dissertations from DePaul University

This case study examines the instructional design model used to develop scalable online courses in the Healthcare Information Management (HIM) program at an online healthcare education institution. With the growing demand for healthcare professionals, heightened by global crises such as the COVID-19 pandemic, scalable and efficient online education solutions are vital. The study explores how collaboration between Curriculum and Academic departments ensures alignment with industry standards, promotes efficiency, and maintains academic rigor. Using a case study methodology, the research analyzes the roles, phases, and outcomes of the instructional design process, emphasizing reductions in development time, cost, and resources while preserving …

Childhood Myopia Part Ii: Treatment Mechanisms, Emerging Options, And Considerations, Safal Khanal Dr, Erin S. Tomiyama Dr, Síofra Harrington Dr

Articles

Abstract

The rapidly increasing prevalence of myopia and its association with vision-threatening complications in later life has intensified efforts to identify treatments that can prevent the onset and slow the progression of myopia in children. These efforts have led to the development of several optical, environmental, and pharmacological myopia control treatments. Investigations of additional treatment options are ongoing and have shown great promise for clinical translation. Although significant progress has been made in identifying potential pathways and modes of action of these treatments, a complete mechanistic understanding is still lacking. This critical review article explores the potential mechanisms underlying the …

Childhood Myopia Part I: Contemporary Treatment Options., Safal Khanal Dr, Erin S. Tomiyama Dr, Síofra Harrington Dr

Articles

Abstract

Childhood myopia is a growing global public health concern. Treatments to control myopia are a priority because myopia, particularly high myopia, poses significant lifelong risks of vision loss from myopia-associated ocular pathologies. Intensive research efforts over the past two decades have led to the development of several effective strategies for controlling myopia in children: increased time outdoors, atropine eye drops, dual-focus and multifocal contact lenses, orthokeratology lenses, and specialized spectacle lenses. While the efficacy of these strategies is variable, evidence is growing regarding the potential benefits of applying these interventions in children with myopia, although none completely halt myopia …

Thin And Ephemeral Snow Shapes Melt And Runoff Dynamics In The Peruvian Andes, Catriona L. Fyffe, Emily Potter, Evan Miles, Thomas E. Shaw, Michael Mccarthy, Andrew Orr, Edwin Loarte, Katy Medina, Simone Fatichi, Rob Hellström, Michel Baraer, Emilio Mateo, Alejo Cochachin, Matthew Westoby, Francesca Pellicciotti

School of Geography, Earth and Environmental Sciences

The snow and glaciers of the Peruvian Andes provide vital water supplies in a region facing water scarcity and substantial glacier change. However, there remains a lack of understanding of snow processes and quantification of the contribution of melt to runoff. Here we apply a distributed glacio-hydrological model over the Rio Santa basin to disentangle the role of the cryosphere in the Andean water cycle. Only at the highest elevations (>5000 m a.s.l.) is the snow cover continuous; at lower elevations, the snowpack is thin and ephemeral, with rapid cycles of snowfall and melt. Due to the large catchment …

‘I Want To Break Free’ - Reflecting On The Use Of Educational Escape Rooms For Entrepreneurial Education And The First Year Experience, Jennifer Cowman

Irish Journal of Academic Practice

This reflective case study explores the use of Educational Escape Rooms (EERs) within a first-year business module at TU Dublin, developed in response to persistent engagement and retention challenges (Shah et al., 2021; Byrne et al., 2012). Using BreakoutEDU kits and guided by best practice principles including alignment, narrative, and debriefing (Nicholson, 2016; Veldkamp et al., 2020a), sequential EERs were implemented over two academic years. The design focused on key entrepreneurial competencies such as collaboration, communication, and problem-solving (Duggins, 2019; Hartman-Caverly, 2022), with tasks embedded in module topics on environmental analysis and introduction to marketing. Observational insights suggest EERs yielded …

Partitioning Around Medoids On Product Spaces: A Clustering Approach For Cylindrical Data, Yahia Hammami, Houyem Demni, Amor Messaoud, Giovanni C. Porzio

SAML-25 Workshop on Statistical and Machine Learning

Clustering is a common unsupervised task in data analysis and machine learning. It deals with finding clusters of objects that are characterized by the highest similarity within the same cluster and the highest dissimilarity between different clusters. One of the most used algorithms in clustering is the popular Partitioning Around Medoids (PAM), also known as k-medoids [4, 5]. The algorithm imposes the center of clusters to be some of the data points, and it looks for a minimal value of the sum of the dissimilarity to all the objects. One of the recognized properties of such a method is its …

The Golden Standard: Potential Of Gold Nanoparticles In Cancer Research And Therapy, Caoimhe Mcmanus, Shubhrima Ghosh Dr.

Level 3

No abstract provided.

Development Of Antimicrobial Formulations From Natural Extracts And Zinc Nanoparticles, Mia Keane, Lily Jaiswal, Shiv Shankar

Level 3

No abstract provided.

A Cascading Effects Model Of Early Sensory Development In Autism, Natalie Russo, Carissa J. Cascio, Grace T. Baranek, Tiffany G. Woynaroski, Zachary J. Williams, Shulamite A. Green, Roseann Schaaf

Department of Occupational Therapy Faculty Papers

Autism has historically been defined by the presence of differences in social communication and restricted, repetitive patterns of behavior, interests, or activities (RRBs). Since 2013 when the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders was published, sensory features were added as one of the polythetic restricted and repetitive behavior diagnostic criteria of autism, though it has remained understudied. Here, we summarize theory and research to provide support for the perspective that early sensory functions and experiences play a primary role in autism and have downstream effects on social communication and repetitive behavioral features of autism. The …