Digital Commons Network^™

Exponentially Many Correspondence Colourings Of Planar And Locally Planar Graphs, Luke Postle, Evelyne Smith-Roberge

Faculty Publications – Mathematics

We show that there exists a constant c>0 such that if G is a planar graph with a 5-correspondence assignment (L,M), then G has at least 2c⋅v(G) distinct (L,M)-colourings. This confirms a conjecture of Langhede and Thomassen. More broadly, we introduce a general method showing how hyperbolicity theorems for certain families of critical graphs can be used to derive lower bounds on the number of colourings of the associated class of planar graphs. Hence our main result follows from this method plus a technical theorem (that we proved in a previous paper) involving the hyperbolicity …

Energy Poverty, Economic Growth And Environmental Degradation In South Asia: Do Energy Resources Matter?, Memona Rasheed, Hooi Hooi Lean, Nam Foo

Research outputs 2022 to 2026

Developing countries can combat energy poverty by enhancing renewable energy and economic growth with minimal adverse environmental effects. In this paper, we present a comprehensive analysis of energy poverty, renewable energy, economic growth, carbon dioxide emissions, and urbanization (URB) in South Asian countries from 1990 to 2021, focusing on Pakistan, India, Bangladesh, and Sri Lanka. We employed econometric analysis techniques like Panel Pooled Mean Group (PMG)-Autoregressive Distributed Lag (ARDL), Fully Modified Ordinary Least Squares (FMOLS), and Dynamic Ordinary Least Squares (DOLS) to provide empirical results, as they enable panel data and control for endogeneity. The findings suggested that the fight …

Sales Prediction In Omnichannel Distribution Systems Based On Consumer Behavior Using Process Mining And Arimax, Ferra Arik Tridalestari, Mustafid Mustafid, Ferry Jie, Hanung Nindito Prasetyo

Research outputs 2022 to 2026

Omnichannel distribution integrates multiple sales channels into a single management platform to enhance customer experience. However, the complexity of consumer behavior data across channels often prevents business owners from effectively analyzing and predicting sales. This study proposes a sales prediction model in omnichannel distribution systems based on consumer behavior using a collaborative approach that integrates process mining and autoregressive integrated moving average with exogenous variables (ARIMAX). Event log data from an omnichannel service provider were used to extract consumer activity patterns, which were then analyzed through process discovery algorithms to identify dominant behavioral processes. The resulting behavioral indicators served as …

Enhancing Healthcare Security: Manifold-Aware Machine Learning For Robust Adversarial Attack Detection In Iomt Networks, Mohmmad Al-Fawa’Reh, Mohammed Kaosar

Research outputs 2022 to 2026

The widespread adoption of Internet of Medical Things (IoMT) devices and the increasing movement towards telehealth have revolutionized healthcare delivery but also introduced significant security challenges. Tiny Machine Learning (TinyML) models deployed on resource-constrained medical devices are vulnerable to adversarial attacks that can compromise patient data and device functionality, posing risks to patient safety. To address these critical security concerns, this paper proposes MARD (Manifold-Aware Robust Defense), a defense mechanism designed to enhance the robustness of TinyML models. MARD trains a compact student model by transferring knowledge from a teacher model that incorporates Graph-based Manifold Regularization (GMR) and Manifold Mixup …

Music As A Distraction During Reading: Music Listening Habits Of University Students, Lindsey Cooke, Craig Speelman, Ross Hollett

Research outputs 2022 to 2026

Recent research indicates high proportions of individuals report they have music playing while they read. This behaviour has implications for effective comprehension, as some scholars suggest the presence of music depletes cognitive resources, resulting in a greater chance of becoming distracted. By contrast, some have claimed that listening to music can improve cognitive performance by increasing physiological arousal and improving mood. This study captured self-reported behaviours of university students regarding whether they chose to listen to music while reading for study purposes. Reasons for listening varied, with reports of increased motivation, enhanced focus, or masking external noise. The most listened …

Priority Questions For The Next Decade Of Blue Carbon Science, Peter I. Macreadie, George E. Biddulph, Pere Masque, Hilary Kennedy, Jimena Samper-Villarreal, J. Patrick Megonigal, Hannah K. Morrissette, Tania E. Romero-Gonzalez, Vanessa Hatje, Jana Friedrich, Sigit D. Sasmito, Kenta Watanabe, Inés Mazarrasa, Dorte Krause-Jensen, Janine B. Adams, Miguel Cifuentes-Jara, Ariane Arias-Ortiz, Andre S. Rovai, Milica Stankovic, Kirsten Isensee, Ana M. Queirós, Luzhen Chen, Jorge Herrera-Silveira, Catriona L. Hurd, Rashid Ismail, Ken W. Krauss, Anna Lafratta, Maria M. Palacios, William E.N. Austin

Research outputs 2022 to 2026

Blue carbon ecosystems, classically defined as mangroves, tidal marshes and seagrasses, but increasingly expanded to include ecosystems such as tidal flats, macroalgal forests and shelf sediments, contribute to climate change mitigation and biodiversity support. Here, seven years after the last global assessment of research priorities, we conducted a priority-setting exercise to identify persistent knowledge and implementation gaps, and the strategic priorities that must be addressed to enable scalable, high-integrity and equitable management of blue carbon ecosystems in a rapidly evolving policy and finance landscape. The highest priority focuses on managing blue carbon ecosystems to support coastal communities while integrating traditional …

Redox-Mediator Enhanced Electrochemiluminescence Under Non-Aqueous Conditions, Steven J. Blom, Fazeleh Mesgari, El M.S. Martin, Egan H. Doeven, David J. Hayne, Timothy U. Connell, Peter J. Barnard, Narges Saeedizadeh, Seyed Mohammad Jafar Jalali, Paul S. Francis

Research outputs 2022 to 2026

The introduction of small-molecule redox mediators into aqueous co-reactant electrochemiluminescence (ECL) systems has emerged as an effective strategy to increase signal intensity. Herein, we investigate the influence of a series of neutral iridium(iii) complexes (Ir(pmi)3, Ir(ppy)3, Ir(ppz)3 and Ir(ppy)2(acac)) as redox mediators for co-reactant ECL in acetonitrile. Using [Ru(bpy)3]²⁺ as a benchmark luminophore and tri-n-propylamine (TPrA) as a co-reactant, the redox mediators elicit similar effects in this solvent to those of their sulfonated [Ir(sppy)3]³⁻ and [Ir(sppz)3]³⁻ analogues under aqueous conditions. The Ir(ppz)3 complex was most effective; at a concentration of 100 µM it produced an 11-fold increase …

Attacks And Detections In Recommender Systems: A Comprehensive Analysis For Models, Progresses, And Trends, Yan Feng, Zhihai Yang, Kexin Li, Jianxin Li, Pinghui Wang, Zhiquan Liu

Research outputs 2022 to 2026

Recommender systems (RSs), as crucial components of online services, can help users efficiently obtain information they may like. In reality, RSs face long-term threats. Attackers manipulate recommendation results by injecting malicious data in order to obtain benefits. At present, research on the security of RSs lacks a comprehensive understanding of attack capabilities. Moreover, existing defense strategies have not yet been systematically associated with attack characteristics. More importantly, existing defense methods rarely focus on real unlabeled data in practical application scenarios for anomaly detection and forensics. Therefore, this survey systematically analyzes the security of RSs and provides new insights. Specifically, we …

Lack Of Increase In Mercury Contamination In Coastal Western Australia Since European Settlement, Martin Dahl, Larissa Schneider, Harald Biester, Richard Bindler, Antonio Martinez Cortizas, Paul S. Lavery, Miguel A. Mateo, Oscar Serrano

Research outputs 2022 to 2026

Current knowledge of long-term mercury (Hg) deposition is predominantly based on studies from the Northern Hemisphere, leading to a geographical bias in the comprehension of the global Hg cycle. Aiming to contribute to fill this knowledge gap, our study presents a high-resolution Hg record of a seagrass Posidonia australis sedimentary archive encompassing the last 3300 years in the Waychinicup estuary (Western Australia, WA). This setting is an ideal site for studying the natural Hg cycle, as it is located in the southwest of the state, outside the prevailing wind patterns that transport emissions from major Hg sources. Our results show …

Satellite Observations Reveal Ecosystem Resistance And Resilience To Short-Term Water Stress Driven By Dominant Vegetation Along A Rainfall Gradient In Australia, Huanhuan Wang, Qiaoyun Xie, Sally E. Thompson, Caitlin E. Moore, David L. Miller, Erik J. Veneklaas, Richard P. Silberstein, Xing Li, Jingfeng Xiao, Belinda E. Medlyn, William K. Smith

Research outputs 2022 to 2026

Climate change is projected to intensify water stress in many ecosystems and poses threats to their stability, which can be quantified through ecosystem resistance and resilience. Relevant studies mostly focused on multi-year or annual droughts, and in spatially homogeneous or species-specific ecosystems. However, resilience and resistance within complex ecosystems, where different plants exhibit different adaptations and recovery behaviours, are less understood. Using productivity data from satellite-derived GOSIF (Global Orbiting Carbon Observatory-2 Solar-Induced Fluorescence) and flux towers, we examined vegetation responses to short-term (<1 year) water stress events from 2000 to 2018 along the North Australia Tropical Transect, which spans a 1600 mm rainfall gradient and transitions from seasonal mesic to non-seasonal arid ecosystems. We define resistance as productivity maintained during stress relative to a multi-year average baseline, and resilience as the extent to which productivity recovered one year after stress relative to the same baseline. Our results show that ecosystem resistance to water stress was lowest in semi-arid regions but higher in both arid and mesic regions, while ecosystem resilience showed the opposite pattern. These spatial patterns occurred regardless of seasonality and were mainly associated with dominant vegetation type. Woody savanna-dominated mesic regions exhibited highest resistance (0.82 ± 0.13, p < 0.001) and lowest resilience (0.26 ± 0.19, p < 0.001), shrublands in arid areas had intermediate values of both resistance (0.81 ± 0.14, p < 0.001) and resilience (0.27 ± 0.22, p < 0.001), while the grasslands in semi-arid regions had low resistance (0.78 ± 0.15, p < 0.001) and high resilience (0.38 ± 0.24, p < 0.001). The highest likelihood (>75.0 %) of full recovery (i.e., exceeding baseline after one year) occurred during the wet season in …

The Interaction Between Academic Self-Efficacy And Social Support: Exploring Moderation Effects On Academic Performance And Emotional Well-Being During The Transition To Secondary School, Luis Josué Ortiz Martes

Theses and Dissertations

The transition to secondary school can intensify academic demands and emotional strain, making it a critical context for examining students’ psychological and social resources. This applied dissertation examined whether perceived social support (SS) moderates the association among academic self-efficacy (ASE), academic performance (AP) and emotional well-being (EWB) among seventh-grade students at a private, multilingual school in Puerto Rico. Using a time-lagged, nonexperimental correlational design, 14 students completed the academic subscale of the Self-Efficacy Questionnaire for Children (SEQ-C) and the Social Support Appraisals Scale (SS-A) at the start of the academic year; EWB was assessed at midyear with the Negative and …

Elementary Teachers’ Perceptions Of Differentiating Tier 1 Reading Instruction Within A Multi-Tiered System Of Support Framework, Ivonne Ciresi

Theses and Dissertations

This generic qualitative dissertation explored elementary teachers’ perceptions and experiences of implementing Tier 1 differentiated reading instruction within a Multi- Tiered System of Support (MTSS) framework. Establishing effective systems and supports for comprehensive reading instruction in the Tier 1 classroom is a critical component of MTSS. Given the range of structures required, including instructional routines, resources, and ongoing professional development, it is important to understand how teachers navigate the challenges of differentiating reading instruction. The purpose of this study was to examine how teachers implement differentiation during core reading instruction, the challenges they encounter, and the role of professional learning …

Perceptions And Experiences Of Teachers Regarding How Their Students’ Attendance Rate Impacts Their Academic Achievement, John Logan Jr.

Theses and Dissertations

Chronic absenteeism has emerged as a critical educational concern nationwide, particularly following the COVID-19 pandemic. National data indicate that chronic absence rates increased from 15% in 2019 to 28% in 2022, and in the targeted rural South Carolina district, 25% of students were chronically absent in 2022–2023, rising to 28% in 2023–2024. Persistent absenteeism is associated with lower academic performance, widened achievement gaps, and diminished long-term educational and workforce outcomes, especially among socioeconomically disadvantaged and minority students.

The purpose of this qualitative phenomenological study was to examine teachers’ perceptions and experiences regarding how students’ attendance rates influence academic achievement in …

Culturally Responsive Pedagogy: Its Role In Maximizing Students’ Performance On Standardized Tests, Keisha Ricketts-Martin

Theses and Dissertations

This applied dissertation was designed to highlight the importance of pedagogy for cultural responsiveness, and to explore the relationship between such pedagogy and middle school students’ performance on state or standardized tests. Therefore, this study explores the educational or academic values that students will gain from being engaged in a learning environment that recognizes their culture and uses it as a tool to maximizing their educational outcomes.

This research employed convergent parallel mixed method design. Therefore, it implemented the qualitative and quantitative approach at the same time and placed equivalent worth to the information collected by each approach. Therefore, the …

Implementación De Estrategias En La Enseñanza De Los Números Reales A Estudiantes Con Formación Deficiente En Matemática, En Un Instituto Técnico Superior Comunitario De La República Dominicana, Antonio Manuel Rojas Taveras

Theses and Dissertations

Este estudio abordó la problemática del bajo rendimiento en la enseñanza y aprendizaje del conjunto de los números reales en estudiantes de un instituto técnico superior de la República Dominicana que presentaron una formación deficiente en matemáticas. Se observó que los métodos de enseñanza tradicionales, basados en la memorización y la repetición, no son efectivos para abordar las necesidades de estos estudiantes, lo que genera desmotivación y un serio obstáculo para la finalización de sus carreras. Además, factores como el contexto sociocultural, la falta de recursos didácticos, la escasa capacitación docente y los desafíos estructurales del sistema educativo dominicano contribuyeron …

First-Year Academic Success Strategies For Student Veterans, Vincent Ciarla

Theses and Dissertations

This qualitative case study explored the perceptions and experiences of student veterans regarding academic success strategies during their first year of college. The study was guided by three research questions examining perceived difficulties, needed support systems, and overall transition experiences. Five student veterans who had successfully completed their first year at a community college participated in semi-structured interviews. Data were analyzed using multi-cycle coding procedures, including open coding, pattern coding, and cross-case analysis, resulting in the identification of recurring themes.

Findings indicated that participants experienced initial confusion related to institutional processes, challenges navigating educational benefits, and difficulty adjusting to differences …

Impact Of Single-Gender Education On Academic Performance, Stacey Wilcher

Theses and Dissertations

This dissertation examines the performance of middle school students Grades 6–8 in single-gender versus coeducational schools in a large urban district in the southeastern United States. It evaluates whether single-gender education leads to better academic outcomes and higher engagement, offering important insights for educational leaders and policymakers.

The study utilized Social Cognitive Theory and gender segregation theory through a mixed-methods approach, collecting quantitative data from standardized assessments (2021-2025) like the GMAS and MAP. Statistical analyses, including t-tests and ANOVA, were used to assess academic performance. Qualitative data from interviews and focus groups explored classroom engagement and teaching practices.

Participants included …

From Bias To Bottleneck: A Quantitative Analysis Of Gender Preferences In Tech Hiring, Uma Chidambaram

Theses and Dissertations

This applied dissertation examined whether gender preferences influence hiring decisions in the information technology (IT) sector, and whether such preferences contribute to the ongoing labor shortage in the field. Despite national and international initiatives to close the gender gap, women continue to represent only 28% of the United States IT workforce and remain significantly underrepresented in technical and leadership roles. Grounded in the Eagly and Karau (2002) Role Congruity Theory of Prejudice, this study investigated whether evaluator gender and candidate gender alignment affect interview selection outcomes at the résumé screening stage for both leadership and non-leadership IT positions.

A quantitative, …

Increasing Reading Comprehension Of Middle School Students With Hearing Disabilities, Abbis Bivins

Theses and Dissertations

In this study, the effectiveness of researcher-created training sessions for teachers designed to improve reading comprehension in class for students who are deaf or hard of hearing was examined. The training was focused on key instructional components, including morphology, syntax, vocabulary, phonology, explicit feedback, and activation of prior knowledge. Additionally, parent-focused strategies such as collaboration with professionals, reading routines, summarization, interactive reading, and the use of home language were taught. A qualitative research design was used to explore the perceptions for both teacher and parent groups following participation in six 1-hour training sessions.

Teachers’ findings indicated increased confidence, intentional instructional …

Usage Behavior Of Hispanic English Learners With Bilingual Homework Resources In Developmental Mathematics At Community College, Debra Krieg

Theses and Dissertations

This applied dissertation, grounded in the theoretical framework of metalinguistic awareness, was designed to understand how six Hispanic English learners (ELs) were utilizing homework help resources when offered in both English and Spanish. Specifically, the study was conducted at a mid-Atlantic community college with students enrolled in a developmental mathematics course. Homework has long been established as a tool that increases the probability of academic success. The shift to web-based assignments in developmental mathematics from traditional pencil and paper homework has yielded positive results yet little is known regarding how learners utilize bilingual digital assessment tools to achieve mastery of …

The Continuity And Fluidity Between Emergent Literacy Skills And Literacy Acquisition, Shiesha D. Otokina

Theses and Dissertations

This research study was undertaken because emergent literacy skills are crucial in helping children develop their reading abilities. Research suggests that early intervention is a key strategy for closing the achievement gap, and that early literacy skills develop as early as when children begin to communicate verbally and nonverbally. Studies show that the larger a child's vocabulary is, the quicker they learn to read.This study examined the significance of reading development and a child’s ability to acquire reading skills across the stages of reading acquisition.

This study compared student scores in the experimental and control groups to determine whether the …

Higher-Level Questioning In Elementary English Language Arts, Charity Zawatski

Theses and Dissertations

This exploratory case study addressed the difficulty with higher-level metacognition and questioning in a primary level elementary English Language Arts. This case study was determined as a need based on underperforming scores from the state assessment in ELA.

The research method look at the social phenomenon through inquiry around the rigor in higher-level questioning and the use of hand signals to support connections in learning. The researcher applied a semi-structured interview, an observation checklist, and a random sample of student artifacts as instruments for data collection. The researcher analyzed teachers’ lesson plans for a unit, observed a virtual classroom lesson …

General And Special Education Teachers’ Collaboration And Co-Teaching Experience In Inclusive High School Classrooms, Pascale Atouriste

Theses and Dissertations

This qualitative descriptive study explored the collaboration and co-teaching experiences of general and special education high school teachers in inclusive high school classrooms in Florida. Guided by Pratt's achieving symbiosis theory, the study addressed three re-search questions concerning teachers' perceptions of (a) the benefits of co-teaching and collaboration, (b) the challenges they encounter, and (c) the strategies they find most helpful. Data were collected through semi-structured interviews with 10 general and special education teachers at a public high school in Florida and analyzed using Braun and Clarke's six-step reflexive thematic analysis procedure.

Six themes emerged from the data. For RQ1, …

Estudio De Necesidades De Formación Continua Del Maestro En Las Áreas De Matemáticas Y Lectoescritura Para La Enseñanza De Estudiantes De Preescolar En Head Start, Briseida Benítez González

Theses and Dissertations

La presente disertación aplicada fue diseñada con el propósito de identificar las necesidades de formación continua del maestro preescolar en la enseñanza de matemáticas y lectoescritura en el programa Head Start en el Municipio de Humacao en Puerto Rico. La investigación respondió a tres preguntas de investigación donde se identificaron los componentes metodológicos de alfabetización temprana, así como en matemáticas, necesarios para mejorar la calidad de la enseñanza en preescolar. Para el diseño de esta investigación se utilizó el método cuantitativo con un enfoque descriptivo experimental de carácter exploratorio transversal. La muestra estuvo constituida por 33 educadores y los datos …

Reading Achievement And Response To Intervention Participation Among Socially Promoted Elementary Students In Grades 3 To 5: A Comparative And Predictive Analysis, Paige Griffin

Theses and Dissertations

This applied dissertation examined reading achievement among socially promoted elementary students in Grades 3 to 5 by investigating the relationship between Response to Intervention (RTI) participation and Spring I-Ready Reading Diagnostic scaled scores. Although RTI is widely implemented as a multi-tiered framework to provide targeted instructional support for struggling readers, limited research has examined reading outcomes among socially promoted students in rural elementary schools using standardized reading assessment measures.

This quantitative, non-experimental, causal-comparative study analyzed secure, de-identified archival student data obtained following approval from the Nova Southeastern University Institutional Review Board and authorization from school district personnel. The study included …

The Influence Of Haitian Immigrants’ Culture On Academic Outcomes At Elementary Level, Tonnette Samuels

Theses and Dissertations

This qualitative study explored how teachers, parents, and administrators perceived the influence of Haitian cultural values and practices on the organizational culture and academic outcomes of elementary students in a southern United States county. Guided by the resource-based view theory, which frames culture as an intangible organizational asset, the study used interpretative phenomenological analysis to examine the lived experiences of five participants, including three teachers, one parent, and one school administrator. Data were collected through semi structured interviews and analyzed to develop personal experiential themes for each participant and group experiential themes across cases.

The study’s findings generated four group …

Fundamental Theoretical Difference In Ground-State Spectra Of 2-Electron Systems Bound By Coulomb And Harmonic Potentials, Viraht Sahni, Marlina Slamet

Physics Faculty Publications

We note a fundamental difference in the theoretically obtained ground-state spectra of 2-electron systems bound by the Coulomb and Harmonic potentials. The Coulomb bound systems considered are the natural Helium atom, Hydrogen molecule, and Tri Hydrogen cation. The “artificial” Harmonic bound systems are the 2D semiconductor quantum dot in a magnetic field with the electron spin moment and its interaction with the magnetic field considered, 3D Hooke’s atom, 3D Hooke’s molecule, and 3D Tri Harmonic Oscillator cation. Experiment and theory confirm the ground state of natural systems is solely a singlet state. We prove that for the “artificial” systems in …

Evaluating Llms For Cpe Identification In Iot Reconnaissance, Christopher Davisson

EWU Masters Thesis Collection

Vulnerability identification during penetration testing relies on rigid string-matching to map network scan data to Common Platform Enumeration (CPE) identifiers and downstream Common Vulnerabilities and Exposures (CVEs). The approach frequently fails on physical Internet of Things (IoT) devices, which produce non-standard, irregular service banners that resist deterministic parsing. Large Language Models can reason through these fuzzy associations, but cloud-hosted models introduce cost, latency, and operational security concerns when processing reconnaissance data from live networks. This thesis asks whether locally-hosted open-weight Large Language Models (LLMs) can perform this task well enough to be useful, and how performance varies with model scale, …

What's Your Partnership Recipe? Lessons From A Cupcake-Themed Wondering Session, Maia Elkana, Carol Colaninno, Alexandra Forgerson, Rachel Ruggirello

Institute for School Partnership: Research & Publications

At Washington University’s Institute for School Partnership (ISP), the concept of partnership defines our work as researchers and practitioners interested in advancing high-quality, equitable education and is central to all we do. We are privileged to partner with hundreds of schools and thousands of educators each year across many different programs, projects, and initiatives ranging from fee-for-service professional learning and curriculum programs to long-term research-practice partnership (RPP) work. Just as teacher collaboration is a vital tool in producing healthy learning communities and positive outcomes for students, research has also shown that collaboration between and across teachers, administrators, professional learning providers, …

Front Matter, Konstantin Likharev

Essential Graduate Physics

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