Digital Commons Network^™

Study On Transient Electric Field Of Insulated Rail Joints In High-Speed Railway Stations Based On Dissado-Hill Model, Junli Li, Youpeng Zhang

Journal of System Simulation

Abstract: The transient electric field distribution of insulated rail joints in high-speed railway stations under lightning impulse voltages is critical to their normal operation. Under lightning impulse voltages, considering the relaxation polarization of the insulated rail joint material, a frequency-domain mathematical model of its transient electric field was established. Based on Dissado-Hill model, the measured frequency-domain dielectric spectra were fitted and analyzed to reveal the microstructural characteristics of insulated rail joints and the interaction characteristics between microscopic particles during the polarization process. The results indicate that the relative permittivity of insulated rail joints decreases with the increasing harmonic frequency of …

Intelligent Evaluation Method For Regional Air Superiority Based On Graph Convolutional Neural Network, Peng He, Yubo Tang, Jingde Liu, Yujia Tian

Journal of System Simulation

Abstract: To address the dual challenges of the lack of quantification standards and sparse air combat samples in the superiority evaluation of modern air combat, an intelligent evaluation method for regional air superiority based on a graph convolutional neural network was proposed. The spatial grid method was employed to encode the air situation of the entire battlefield airspace into a new data representation, namely the air superiority matrix. A novel air superiority quantification model was applied to quantify the air superiority label values of spatial grids, and four key operational capabilities closely related to air superiority contention were selected as …

Sensorless Control Of Pmsm Based On An Improved Super-Twisting Sliding-Mode Observer, Shiyu Chen, Xinmin Chen, Xionglong Hu, Heng Wang, Yepeng Han, Jiajie Chen

Journal of System Simulation

Abstract: To address the chattering in back electromotive force estimation and the gain mismatch across a wide speed range when using a conventional super-twisting sliding-mode observer in the sensorless control system of a permanent-magnet synchronous motor, this paper proposed an improved adaptive-gain super-twisting sliding-mode observer. A linear correction term was introduced into the super-twisting algorithm and integrated with a gain adaptation law based on speed feedback, enabling the system to achieve finite-time convergence and high-precision back electromotive force estimation over a wide speed range. A variable-gain adaptive complex-coefficient filter was constructed to effectively suppress the harmonic components in the observed …

Line Spectrum Enhancement Technology Based On Second-Order Vector Hydrophone, Zhengkai Wang, Yirong Yu, Qing Hu

Journal of System Simulation

Abstract: In view of the problem of limited detection of line spectrum signals in low signal-to-noise ratio underwater environments, a spatial-temporal cooperative line spectrum enhancement technology based on a two-dimensional second-order vector hydrophone was proposed. A receiving signal model of the two-dimensional second-order vector hydrophone was established to clarify the spatial characteristics of its output signals. For spatial signal processing, the signals from each channel of the vector hydrophone were fused to suppress noise, and a channel combination method with high spatial directivity gain was proposed to achieve spatial processing gain. For temporal signal processing, an adaptive line spectrum enhancer …

Dodaf-Opm-Sd Cross-Layer Automated Mapping Method Based On A Unified Semantic Bridge, Lei Cheng, Gang Xiao, Binbin Wang, Siming Peng, Haozhe Liang, Xiangwu Gong

Journal of System Simulation

Abstract: To address the problems of the inability of DoDAF views to directly drive simulations and the insufficient cross-layer semantic alignment and consistency verification, a DoDAF-OPM-SD cross-layer semantic automated/semi-automated mapping and verification method was proposed in this paper. Targeting tactical/operational-level problems dominated by "conservation+feedback+time delay", the proposed method reduced manual mapping under expert adjudication based on a "minimal executable view set". The object-process methodology served as a semantic bridge to map architectural elements into the stock-flow-feedback structures of system dynamics; semantic embedding disambiguation, integer programming harmonization, and K-nearest neighbor parameter completion were integrated; end-to-end traceability was connected through traceability identifiers, …

Design And Implementation Of Hdrt Real-Time Simulation System, Huiji Zheng, Guangsen Wang, Qing Liu, Kang Wang, Zhiwei Wang, Zhenyu Zhang, Shuo Wang, Zhu Liu

Journal of System Simulation

Abstract: In view of the real-time simulation requirements of large-scale complex systems such as power electronics, a hidden dragon real-time(HDRT) simulation system was developed. The strict time constraints of simulation tasks were guaranteed based on a resource-dedicated real-time scheme, supporting fixed-step and multi-rate simulations from the second level to the hundred-nanosecond level. A hybrid CPU-field programmable gate array(FPGA) architecture was adopted to accelerate computation. The system could utilize multiple simulators for parallel simulation and realized microsecond-level real-time data interaction between simulators through a dedicated PCIe switch. A single simulator could be expanded through I/O interface equipment, supporting a maximum input …

Numerical Simulation Of Water Tank Solidification In A Firefighting Aircraft Under High-Altitude Cold-Soak Conditions, Guanmian Liu, Zhihang Cheng, Hejun Qin, Kangzhi Yang, Qing Wen, Kun Gao

Journal of System Simulation

Abstract: A systematic numerical simulation study was conducted to address the issue of internal water tank solidification in firefighting aircraft under high-altitude low-temperature conditions. Based on computational fluid dynamics methods, a solidification-melting model considering fluid-structure interaction heat transfer and phase change processes was adopted. Through reasonable simplification of the complex geometric model, a quasi-three-dimensional computational model suitable for engineering analysis was developed. The influence laws of key parameters, including high-altitude cold-soak temperature, ground initial water temperature, and cold-soak time, on the freezing characteristics of the water tank were investigated. Combining with the parameter influence laws, a safety criterion using the …

Combat Effectiveness Evaluation Of Anti-Ship Missiles For Intelligent Autonomous Recognition, Long Zhang, Xuanming Feng, Zhen Lei, Bo Yang, Ying Wang

Journal of System Simulation

Abstract: To address the core issues of poor adaptability of static fusion strategies in existing recognition models, as well as the simplistic evaluation system and its disconnection from dynamic confrontation requirements, a practical four-dimensional evaluation system encompassing "recognition accuracy, antijamming stability, decision timeliness, and modal complementarity" was constructed, and an operational effectiveness composite index (OECI) capable of dynamically adapting to tactical scenarios was proposed. A multimodal dynamic attention fusion network (MDA-Net) for anti-ship missiles in complex confrontation environments was designed. Through heterogeneous feature decoupling, dynamic weighting of cross-modal attention, and a hierarchical gating decision mechanism, the autonomous evaluation and adaptive …

Infrared Image Generation Method Based On Improved Cyclegan, Qiqi Jin, Xiang Zhang, Li Gao, Lin Zhang, Junliang Yan, Peiyao Li

Journal of System Simulation

Abstract: To address the problems in current infrared image generation such as insufficient contrast between target and scene, excessively large discrepancies from real scenes, indistinct thermal source features, and great difficulty in constructing measured infrared image datasets, an improved CycleGAN-based infrared image generation method was proposed. By optimizing the network structure of the generator and adding a non-local module and a CBAM convolutional attention mechanism into the generator, the extraction capability of CycleGAN for infrared features was enhanced, enabling the network to capture the subtle features of targets more accurately; a perceptual loss function was introduced to improve the detail …

Uab Libraries News, 08/09 2026, Uab Libraries

UAB Libraries News

No abstract provided.

Racial And Ethnic Differences In Medications For Opioid Use Disorder And Overdose In 11 State Medicaid Programs From 2016 To 2020, Julie M. Donohue, Bill Wang, Lu Tang, Joo Yeon Kim, Stefanie Junker, Evan S. Cole, Chung Chou H. Chang, Eric Roberts, J. Deanna Wilson, Utibe R. Essien, Katie Gifford, Lindsey Hammerslag, Jeffery Talbert, Katherine Ahrens, David Idala, Shamis Mohamoud, Sarah Clark, Anna Austin, Orrin Ware, Krystel Tossone, Aimee Mack, Carrie Fry, Adam J. Gordon, Andrew Barnes, Sarah Marks, Peter Cunningham, Lindsay Allen, Marguerite Burns

Biostatistics Faculty Publications

Introduction: Access to medications for opioid use disorder (MOUD) varies across racial and ethnic groups. As the largest payer for MOUD, Medicaid has potential to ensure access for all enrollees. We aimed to quantify recent trends and state variation in MOUD use by race and ethnicity in Medicaid. Methods: Using a distributed research network, we conducted a cross-sectional study of 11 states' Medicaid data from 2016 to 2020. Among enrollees diagnosed with opioid use disorder (OUD), we measured the percent receiving MOUD (overall; and methadone, buprenorphine, naltrexone, separately), continuity of MOUD for ≥180 days, and claims-based overdose event rates. We …

Drivers Of Employee Success And Productivity: Analyzing The Role Of An Executive Recruiting Intern, Hayden Raycher

Agricultural Economics and Agribusiness Undergraduate Honors Theses

For an experiential thesis over an internship experience in collaboration with the University of Arkansas and my advisor, Dr. Michael Popp, I collected data over a 9-month period relevant to my internship at Stout Executive Search, an executive recruiting firm. The purpose of the research was to explore the factors that influence productivity in a recruiting environment and provide quantifiable insights into the impact of different job-related achievements towards overall employee success. The research was initially designed to encompass evidence and commentary on training regimens and company culture, as well as job experience, with the latter becoming the sole focus …

The Effect Of Sustainable 3d Store Design On Consumer Online Shopping Behavior, Sophie G. Roussel

Apparel Merchandising and Product Development Undergraduate Honors Theses

Sustainability has become a significant factor in shaping consumer shopping habits. Companies are implementing 3D store designs to provide a more immersive and interactive experience. Further study is needed to investigate whether a sustainable, green-focused 3D storefront shifts consumers’ satisfaction with online shopping and their intention to buy products from a sustainable store. This study seeks to fill the research gap by examining how sustainable 3D store design influences consumer shopping behavior. Specifically, three distinct 3D store mockups were developed using Visual Retailing (VR) technology. The same number of visually appealing features, products, and store layouts was used to make …

Transforming Business Ethics Teaching Through Experiential And Writing Practices, Begimai Abdraeva

GHEA21 Publications

This paper explores how writing-based teaching practices can improve the teaching of Business Ethics. The study is based on the author’s own teaching experience over four semesters at the American University of Central Asia. Using an action research approach, the paper describes how the Institute for Writing and Thinking’s (IWT) pedagogical strategies such as Freewriting, Loop Writing, Dialectical Notebooks, and Process Writing were added to lectures, films, and case studies. The results show that these methods made classes more interactive, encouraged students to reflect on ethical dilemmas, and helped them connect theory with personal and professional experience. Student evaluations and …

August 2026 Library News, University Libraries

Library News

No abstract provided.

Neutralization Of Reactive Oxygen Species With Cobinamide Augments Aortic Dissections And Rupture In Bapn-Administered Mice, Alexis Richard, Zhen Zhou, Jose Emiliano Esparza Pinelo, Callie S. Kwartler, Hema Kalyanaraman, Gerry R. Boss, Hong S. Lu, Alan Daugherty, Dianna M. Milewicz

Physiology Faculty Publications

Thoracic aortic aneurysms involving the root and ascending aorta progressively enlarge and can lead to life-threatening acute aortic dissections, collectively termed thoracic aortic disease (TAD). Oxidative stress due to an excess of reactive oxygen species (ROS) has been implicated in TAD pathogenesis by promoting vascular inflammation, extracellular matrix degradation, and smooth muscle cell apoptosis. Cobinamide (Cbi), a potent antioxidant and vitamin B12 analog, has been reported to slow aortic aneurysm growth in TAD mouse models. We evaluated its efficacy in mice administered b-aminopropionitrile (BAPN) to induce TAD, a model in which aneurysms progress to dissections. C57BL/6J mice of both sexes …

Editorial Review Board Vol. 65 Issue 2

Reading Horizons: A Journal of Literacy and Language Arts

No abstract provided.

Discussion Of Text Revisited: Encouraging Chatting In The Classroom, Melissa Jessup, Ruth E. Jefferson Dr.

Reading Horizons: A Journal of Literacy and Language Arts

Discussion of text in language and literacy instruction has historically been studied with small samples of learners. The study described in this article investigated the relationship between instructional practices associated with discussion of text (chatting about it) and the reading achievement of several subgroups. A large sample of readers (N = 148,800) from the National Assessment of Educational Progress was the subject of the study. Several subgroups, including students with disabilities and students eligible for the National School Lunch Program (students experiencing poverty), were statistically disaggregated; subgroup data and results of analyses are discussed. Suggestions for classroom application are included.

Empowering Future Educators: How Service-Learning Shapes Teacher Candidate Self-Efficacy And Understanding Of Book Access, Nancy F. Hulan, Morgan S. Major

Reading Horizons: A Journal of Literacy and Language Arts

Literacy rates are historically low in areas where access to books is limited. Thus, students with limited exposure to books prior to school pose a unique challenge to teachers, who often feel unprepared to teach students from underserved populations. To help remedy this, teacher candidates need preparation that builds their abilities to provide both access to books and quality literacy instruction for students who live in poverty. The study described in this article investigated the impact of literacy-related community engagement on teacher candidates’ self-efficacy, their understanding of book access, and their perceptions of teachers’ roles in providing book access. Participants …

Deferred Understandings: A Critical Content Analysis Of Representations Of War In Picturebooks, Heeyoung Kim, Jongsun Wee

Reading Horizons: A Journal of Literacy and Language Arts

This article reports on a study that examined eight picturebooks published since 2021 that portray contemporary wars, exploring picturebooks’ potential role in shaping children’s understandings of armed conflict. It investigated how these texts present historical context and construct representations of war. The authors’ analysis focuses on three key elements: the causes of war, depictions of wartime scenes, and the resolutions of war. The findings indicate that the picturebooks portray war realistically through textual and visual narratives, illustrating how war disrupts the child protagonist’s everyday life. However, the books rarely address the underlying causes of war. This study suggests that teachers …

Making Sense Of The Iep: Teacher Perspectives In Implementation In Suburban Schools, Siranda J. Patchel

All NMU Master's Theses

The Individualized Education Program (IEP) is a legal requirement and instructional framework to support students with disabilities. However, inconsistency among IEP classroom implementation is a challenge. The purpose of this study was to explore the implementation of IEPs for students with disabilities as reported by general and special educators in suburban settings, in addition to examining educators’ perceptions of their preparedness and comprehension of IEP-related responsibilities.

The qualitative research design incorporated a survey and follow-up interview response analysis of educators who worked in suburban schools. The responses were analyzed using a thematic analysis approach that consisted of open coding and …

The Stories We Tell About Wolves, Olivia Lubig

All NMU Master's Theses

This study investigated the connections between wolf stories, wolf history, and educational theories: critical literacy, schema theory, reader response theory/transactional theory, and the use of intertextual approaches in the classroom. In this study, I used a mix of transactional theory as the theoretical framework, self-study methodology, and living educational theory research methods to study myself as an educator, methods of teaching in a classroom, and children’s literature. My first finding, detailed in Chapter One, was discovering the connection between wolf stories and wolf history. I argue that the relationship between wolves and humans is represented in literature, and the representation …

Cost-Effectiveness Evaluation Of Artificial Intelligence-Assisted Chest Radiograph Interpretation For Tuberculosis Screening In Rural Health Units In The Philippines, Harold Henrison C. Chiu, Bryan Christopher C. Lao, Gloanne C. Adolor

Graduate School of Business Publications

Background: Tuberculosis remains a major public health burden in the Philippines, where diagnostic delays are amplified by limited radiology capacity in rural health units (RHUs) and geographically isolated and disadvantaged areas (GIDAs). Computer-aided diagnosis (CAD) using artificial intelligence (AI)-assisted chest radiograph interpretation may shorten the screening pathway and reduce reliance on scarce specialist readers. However, its economic value for RHUbased tuberculosis screening has not been fully evaluated.
Methods: We developed a decision-tree cost-effectiveness model in Microsoft Excel 365 to compare AI-assisted chest radiograph interpretation with conventional manual radiologist or teleradiology interpretation among a theoretical annual cohort of 1,000 presumptive tuberculosis …

Impact Of Chiral Chain Conformations On The Self-Assembly Of Helical Polymers, Michael J. Grant

Theses

Polymers are a soft material with diverse applications across a spectrum of technologies including, but not limited to, packaging, drug-delivery, optics, lithography and templating. This ubiquity stems from over a century of in-depth theoretical and experimental investigations relating polymer size, stiffness and architecture to their emergent material properties. Interestingly, unlike small organic molecules where solution behavior is predominantly a function of hydrophobicity, in polymers, adjusting the aforementioned features can have a dramatic impact on their interactions with neighboring molecules. In turn, this allows for a tunable parameter space enabling the ability to achieve specific engineering goals. Yet, while the impact …

The Long Arc Of Global Citizenship: Historical Foundations, Modern Challenges, And Institutional Innovation At Rollins College, Wenxian Zhang

Faculty Publications

The concept of global citizenship can be traced back to the Greek and Roman periods in Western civilization, as well as to ancient Eastern philosophies. Representing both a prescriptive ideal and an aspirational faith in humanity, the notion is closely linked to the historical development of cosmopolitanism, transnationalism, and transnationality. This study first reviews the rich historical roots and core values of global citizenship, along with the growing need for global citizenship education in the modern era. It then highlights several influential individuals who strongly championed its principles, including theoretical physicist and Nobel Prize winner Albert Einstein and internationalist and …

Exploring Factors Related To Retention Of Young Soccer Officials, Jacob K. Tingle, Lynn L. Ridinger, David J. Hancock, Joseph Foran, Lucas Ribeiro

School of Business Faculty Research

Purpose/Rationale

The purpose of this study was to examine factors (needs and motivations) that contribute to retention of young soccer officials.

Design/Methodology/Approach

An online survey was distributed to soccer referees who received their first USSF officiating license as a juvenile.

Findings:

Correlational and regression analyses yielded five key findings: (1) Self-Determination Theory (SDT) principles are salient to retention; (2) Intrinsic Motivation and Sense of Community significantly impact retention; (3) variables across scales were highly correlated and had large effect sizes; (4) findings were similar across demographic variables; and (5) small increases to Relatedness and Choice had a large impact on …

Advancing Sdg 9 Through Ai-Powered Waste Diversion, Ally Murphy

Goal 9: Industry, Innovation and Infrastructure

No abstract provided.

Performing The Self Online: Gender, Identity, And Power In Content Economies, Sergio Germade Ii

Theses & ETDs

This study examines how identity is performed and stabilized within digital platform environments, where visibility becomes central to how the self is recognized and sustained. Drawing on a framework that treats identity as relational, performative, and shaped by algorithmic systems of attention, the study approaches digital selfhood not as a fixed expression of belief, but as an ongoing performance shaped by recognition, engagement, and repetition. Using a comparative case analysis of six creator archetypes across competing ideological orientations and gendered pairings, the study analyzes patterns of self-presentation, audience response, and engagement on YouTube. Through cross-case comparison, the findings show that …

What Fire Reveals: A Portfolio Of Integrated Practice, Harm Reduction, And Liberation-Centered Social Work, Jackie Brittain

Graduate Student Portfolios, Professional Papers, and Capstone Projects

No abstract provided.

The Difference In Social Media Coverage For Male And Female Athletes, Amanda Thomas

Communications and Digital Media Theses

Pulling back the curtain on the reality women athletes face when it comes to their social media coverage. Sports have been male-dominated since the start, but over the years women have become more and more involved in sports as they have their own teams and even sports. However, this issue lies with the overall support and coverage they are receiving from well-known Sports coverage networks. For this study, I looked at social media posts from ESPN, FOX Sports, and NBC Sports focused on the sports of Basketball, Baseball/Softball, and Tennis. In doing this study, I analyzed how many posts men …