Digital Commons Network^™

Aviation Procurement And Sustainability, Kyle A. Paddack

Sustainable Supply Chain Management

This Study investigates the relationship of procurement practices on sustainability performance within the aviation maintenance, repair, and overhaul (MRO) operations utilizing Aeroman - El Salvador's leading MRO provider - as the center of the case study. Utilizing the Triple Bottom Line framework, the research maps out the current sourcing model used, identifying pressures toward single sourcing agreements, expedited logistics, and vague supply chains. a qualitative approach combines data from industry leaders, direct company information, and ESG document analysis form a three-dimensional assessment matrix that evaluate the economic, environmental, and social indicators for the company. Throughout the TBL framework will be …

The Art Of Memory: The Medieval Peutinger Map, Amber Shrewsbury

Dissertations and Theses

The Peutinger map is an enigma: a twelfth-century map of the Roman Empire, it is secular and oddly shaped, its dimensions distorted to show Rome at the center of the world. Its creator, purpose, and provenance currently remain lost to history. Long considered by classicists to be a copy of a lost Roman original, the map has not been seriously examined by medievalists, possibly because it does not adhere to the Christian "T-O" style of medieval mappaemundi.

While other scholars have focused on what the Peutinger map reflects about ancient Rome, I have chosen to explore how the Peutinger …

Ai Project Facilitation Guidance For Research Computing And Data (Rcd) Professionals, Anna Alber, Laura Briggs, Paul Brunk, Manasvita Joshi, Atish P. Kamble, Amira Kefi, Timothy Middelkoop, Semir Sarajlic, Ana Maria Sokovic, Jeffrey N. Valdez, Ying Zhang

Administration and Staff Articles and Research

The role of Artificial Intelligence (AI) in research and education continues to rapidly grow, resulting in increased collaboration between researchers in AI and Research Computing and Data (RCD) professionals to meet the research and teaching demands. RCD professionals bridge the gap between research and technology by guiding and collaborating with researchers and educators through the process of selecting the hardware, software, and services best suited for executing their AI projects. This includes ensuring compliance with funding and regulatory requirements across the entire lifecycle of the project. In this paper, we present an overview of the AI project lifecycle and how …

Antibacterial Effect Of Acetylsalicylic Acid On The Efficiency Of Azithromycin Against Resistant Salmonella Enterica: An In Vitro Study, Sawsan M. Amin, Ihsan M. Ahmed, Ahmed N. Abed

Baghdad Science Journal

This study aimed to determine the antibacterial effect of combined acetylsalicylic acid (ASA) and azithromycin (AZM) against resistant Salmonella enterica. For this, the MIC and MBC of both drugs were determined, and a checkerboard test, a time-killing assay, and scanning electron microscopy were performed. The results showed that ASA had an antibacterial effect with MIC value of 16000 μg/ml and MBC value of 32000 μg/ml. Also, the combination of ASA with AZM has an additive effect with FICI interaction value 1.5 at 8000 μg/ml of ASA and 16 μg/ml of AZM, and this has a direct effect on preventing …

Whole Genome Sequencing Of Curtobacterium Flaccumfaciens Strain Shgh, Isolated From The Nodes Of Olea Europaea In Mosul, Iraq, Shaimaa Yaseen Taha, Ghazwan Qasim Hasan, Igor Ivanovski

Baghdad Science Journal

Curtobacterium flaccumfaciens SHGH was associated with Koch's postulates about wilt disease in Olea europaea (olive trees) located in Mosul, Iraq. Since olive trees are an important cash crop for Iraq, a whole-genome analysis of SHGH was conducted. The complete genome was sequenced using the IIIumina MiSeq sequencer and uploaded to GenBank under the accession number JAUMSN000000000.1. The circular chromosome consists of 3,834,306 bp, 70.7 percent GC content, 4,176 protein-coding sequences, 53 RNA genes, 7 ribosomal RNA genes, and 42 transfer RNA genes. According to the in silico DNA-DNA hybridization technique are 11 strains closely related to the SHGH strain. The …

Calculate Greenhouse Gas Emissions From Road Vehicles In Baghdad City Using Ipcc Methodology, Zainab N. Abdulateef, Adel H. Talib, Maitham A. Sultan

Baghdad Science Journal

The transportation sector plays a vital role in facilitating human well-being by moving people and goods. In Iraq, the sector faces significant challenges, including an annual fuel loss of up to 500 billion dinars and substantial fuel wastage. Each vehicle consumes approximately 570 liters of gasoline annually due to traffic congestion, as the number of vehicles at peak times is estimated per kilometer of the three-lane street (1,059 cars km/h). In contrast, their number is estimated at regular times (450 cars km/h), leading to increased greenhouse gas emissions from fuel combustion used to operate vehicle engines. The current study analyzed …

Experimental Formula Of Single Particle Level Density In Pre-Equilibrium Reaction, Sarah Shakir Ali, Ali Dawoud Salloum

Baghdad Science Journal

In this study, a new formula for single particle level density was found from experimental values of single particle level density using the curve fitting. This new formula was substituted in Ericson's formula which is used to calculate the partial level density in pre-equilibrium nuclear reactions and in the corrected formulas of William's formula, spin corrected formula and surface formula. The results for each formula were compared with the results for the same formula using single particle level density from the equidistant spacing model ESM. It was noticed that there is good agreement between the results of single particle level …

Assessing The Influence Of Radiotherapy On The Level Of Zinc In Cancer Patients Serum, Muqdad A. Yousif, Talib A. Abdulwahid

Baghdad Science Journal

Cancer patients often undergo radiation therapy as part of their treatment plan, and certain levels of zinc are essential for repairing DNA and maintaining our immune system. Therefore, this study aimed to determine the extent of the effect of this type of treatment on the level of zinc in blood serum, as 106 samples were collected from both healthy individuals and cancer patients to measure zinc levels in blood serum. Atomic absorption spectroscopy was used after properly preparing the sample, and the results showed that the healthy group had an average zinc concentration of (1.316 ± 0.10) × 10^{3 …}

Utilizing Trichoderma Harzianum And Semi In-Planta For Management Damping-Off Fusarium Solani In Corn Varieties, Zul Fauzi Nugroho Hadi, Suhartiningsih Dwi Nurcahyanti, Rachmi Masnilah, Ankardiansyah Pandu Pradana, Sigit Prastowo, Hardian Susilo Addy, Syaiful Khoiri, Ali Wafa

Baghdad Science Journal

The utilization of Trichoderma harzianum (Hypocreales: Hypocreaceae) as a biological control agent against plant pathogenic fungi has gained extensive recognition in the field of agriculture. Fusarium solani (Hypocreales: Nectriaceae) is a pathogen that causes damping-off in corn plants and poses a significant global challenge to corn farmers. This study aimed to investigate the potential management of damping-off disease caused by F. solani in three varieties of corn, utilizing T. harzianum in conjunction with the semi in-planta method. It was demonstrated that both in vitro and semi in-planta T. harzianum treatments had the ability to suppress damping-off disease in corn varieties. …

Field Width Comparison Of The Photon Beams 6 Mv And 10 Mv Coming Out Of The Radiotherapy Linear Accelerator, Basma Saber Lazem, Ikram Jumaa Hassan, Basim Khalaf Rejah, Hyam Khalaf, Mostafa Yuness Abdelfatah Mostafa

Baghdad Science Journal

The current study aims to measure and compare the field width emerging from the radiotherapy linear accelerator in different directions, three dimensions were chosen to measure the field width in an orderly (inline, cross line, diagonal A and B) manner. The 10 Mv and 6 Mv photon beam energies were used, and the Star Track device was adopted to measure the field width in different directions. The radiotherapy linear accelerator at the Baghdad Center for Radiation Therapy and Nuclear Medicine was used every week five weeks. The results recorded that when the energy increased 10 Mv, there was an increase …

Solving Hierarchical Variational Inequality For Almost Mean Nonexpansive Mappings, Noor Saddam Taresh, Salwa Salman Abed

Baghdad Science Journal

A clear common method in solving some types of nonlinear problems is to exchange the original problem with a collection of regularized problems and all these regularized problems have exactly one solution. A particular solution of the original problem will be obtained as a limit of these unique solutions of the regularized problems. This idea is used to provide a method for the hierarchical fixed point approach to solving variational inequality problems (VIPs). In this work, we intend to study two new iterative schemes by examining their strong convergence to a common fixed point for mappings defined for a nonempty …

Semiparametric Learning Of Integral Functionals On Submanifolds, Xiaohong Chen, Wayne Yuan Guo

Cowles Foundation Discussion Papers

This paper studies the semiparametric estimation and inference of integral functionals on submanifolds, which arise naturally in a variety of econometric settings. For linear integral functionals on a regular submanifold, we show that the semiparametric plugin estimator attains the minimax-optimal convergence rate n—s2s+d-m, where s is the Hölder smoothness order of the underlying nonparametric function, d is the dimension of the first-stage nonparametric estimation, m is the dimension of the submanifold over which the integral is taken. This rate coincides with the standard minimax-optimal rate for a (d − m)-dimensional nonparametric estimation problem, illustrating that integration over the …

Deepfakes Deconstructed, Jacob Noti-Victor

Articles

With the rapid advancement of photorealistic generative Al technology, the problem of sexually explicit deepfakes has grown more urgent than ever. Thanks to widely available Al systems, users can now easily create images that appear to depict real people engaging in sexual acts. Not only have Taylor Swift and other celebrities been targeted, but deepfakes are also now alarmingly prevalent in American schools.

Comparing And Evaluating Contralateral Breast Dose Relative To Median Ptv Tumor Bed Dose For Hypo-Fractionated Breast Treatments Using Import High Dose Constraints., Shannon J. Nordby

Masters Projects

This study is aimed to compare two different planning constraints for post-lumpectomy whole breast radiation treatments to evaluate whether or not the mean dose to the contralateral breast can be significantly reduced while maintaining plan quality for treatment. A total of 10 patients who had first undergone a lumpectomy were included into this study. Each patient’s initial treatment plan was created using a conventional approach with a mean dose constraint of < 600 cGy (Plan A) and then was replanned using the Import High protocol of a mean dose constraint, aiming to further push for a mean dose < 150 cGy (Plan B) to the contralateral breast. Both of these plans were analyzed for PTV coverage and dose to the surrounding critical structures. The results have shown that the contralateral mean dose was significantly reduced from an average of 216.32 in Plan A to 126.53 cGy in Plan B. All while meeting the target coverage of > 95% isodose line. Statistical testing showed a significant difference between the two planning techniques of lowering the contralateral dose (p < 0.0001), and normality testing supported the validity of the data analysis. In addition to a substantial dose reduction to the contralateral breast, Plan B maintained equal or improved dose constraint to other surrounding critical organs at risk, including the heart, lungs, spinal cord, and thyroid. The Import High protocol demonstrated consistent outcomes across diverse patient anatomies. These findings suggest that by using the Import High mean dose constraint, it is possible to maintain plan quality while reducing dose to the contralateral breast. This approach may help reduce the risk of long-term side effects and improve the patient’s overall outcomes in whole breast radiation treatments.

Impacts Of Permafrost Thaw And Methane Cycling In A Northern Peatland, Hannah Defelice

Theses

Climate change is disproportionately impacting high latitude regions, resulting in thawing permafrost, changes in vegetation, hydrology and greenhouse gas emissions. As permafrost thaws in peatlands, ground subsidence occurs, resulting in a transition from elevated palsa to lower, wetter bogs and fens. Changes in vegetation and hydrology with thaw result in increased methane (CH4) fluxes and distinctive shifts in the carbon isotope signature of porewater and emitted CH4. Previous research has established the differences between these landcover classes; however, we know little about how CH4 cycling processes change during land class transitions. To address this gap, we compared recently formed bogs …

Digital Evidence As A Means Of Proof In Criminal Proceedings In The Uae, Dr.Khaled Ramadan Soltan

Faculty Peer-Reviewed Papers | بحوث هيئة التدريس المحكمة

This paper addresses key issues related to the admissibility of digital evidence—a pivotal concern in modern legal proceedings. The use of such evidence is fraught with challenges, particularly due to the rapid technological changes and heightened concerns surrounding electronic data privacy. In the criminal justice system, these challenges can impact the admissibility of evidence, its presentation in trial, and the charging and resolution of cases.

This study examines the difficulties of admitting digital proof before the UAE judiciary. Considering the trend towards the digital world as an alternative to the tangible world, interest is increasing in the extent of the …

Critical Black Expressionism: A Womanist Manifesto, Rolanda Jw Spencer

Theses

This thesis introduces Critical Black Expressionism (CBE) as a visual, spiritual, and intellectual methodology rooted in Black feminist traditions, ancestral knowledge systems, and artistic practice. Grounded in womanist theory and decolonial inquiry, the central argument asserts that Black women’s lived experiences, cultural memory, and spiritual cosmologies constitute a rigorous and sovereign framework for artmaking. Rather than borrowing from Eurocentric pedagogies, this approach draws from oral traditions, sacred ritual, and master-apprentice models that have long existed within African and African American communities. The Iyami Aje: Mothers + Witches collection is the visual embodiment of this research. Composed of multimedia sculptures, altar-based …

A Perovskite Nanocomposite And Self-Assembled Nanoparticle-Decorated Cathode For Low Temperature Sofcs, Chunyang Yang, Guoan Wang, Xingjian Xue

Faculty Publications

One-pot route synthesis of an A-site Sm-doped simple perovskite with nominal composition Sm_0.10Ba_0.90Co_0.8Fe_0.2O_3−δ leads to a novel perovskite nanocomposite containing ∼90% A-site cation deficient cubic simple perovskite Ba0.925(Co/Fe)0.962Sm0.038O_3−δ and ∼10% orthorhombic layered perovskite SmBa(Co/Fe)₂O_5+δ. The synergy of the two phases in the nanocomposite results in high electrochemical kinetic properties at low temperatures. With the novel perovskite nanocomposite, a surface nanoparticle-decorated nanocomposite cathode is self-assembled through a one-step sintering process. The corresponding anode-supported cell delivers a peak power density of 1271 mW cm^{−2 …}

Using Artificial Intelligence To Improve Customer Engagement: User Experience With Chatbot Technology, Aicha Zemmouri, Salma Choufari

Journal of Marketing and Consumer Behaviour in Emerging Markets

This study examines the impact of artificial intelligence (AI) on improving customer loyalty through the use of chatbot technology, with a specific focus on the user experience of Moroccan consumers. The increasing integration of AI into customer service, especially through chatbots, represents a significant shift in how companies interact with their customers. Given Morocco’s growing digitalization and the strategic importance of customer loyalty, it is critical to understand how consumers perceive and interact with these technologies. To achieve this, the study used a qualitative research method of semi-structured interviews to investigate consumers’ perceptions, interaction behaviours, and challenges with chatbot usage. …

2025, 1(20)

Journal of Marketing and Consumer Behaviour in Emerging Markets

Full Issue 2025, 1(20)

Ud In The News July 12-18, University Of Dayton

News Releases

A pair of publications listed the schools of engineering and business among the best in the nation. Local media highlighted biology research, legal expertise, and the transition from outgoing board chair Rick Omlor to new board chair Deb Tobias.

Combat-Oriented Comprehensive Simulation And Verification Technology For Equipment System Rms, Yue Zhang, Wenliang Zhang, Qiang Feng, Xing Guo, Yi Ren, Zili Wang

Journal of System Simulation

Abstract:Existing reliability maintainability supportability (RMS) simulation and verification methods for equipment systems are typically conducted under standard conditions and suffer from weak combat environments and task modeling capabilities. To address this limitation, a multi-agent RMS simulation and verification framework was proposed. Key breakthroughs included agent modeling techniques for complex environments and variable tasks, interaction mechanisms among environmental agents, task agents, equipment, and support systems, and a simulation-based comprehensive RMS evaluation method. Case studies demonstrate that the proposed method effectively models complex environments and variable tasks, supports combat-oriented simulation and verification and design scheme evaluation, and meets combat-ready development requirements.

Reflections On Innovative Approaches To Autonomous Simulation Software, Feng Tian

Journal of System Simulation

Abstract: Given China's weak foundation in simulation software, simply replicating the development paths of these global leading companies offers limited potential for leapfrog development. Based on an analysis of pitfalls in the independent innovation of domestic simulation software, this paper proposed and elaborated on six strategic approaches: avoiding established paths, aligning with national realities, pursuing extreme performance, leveraging special needs to advance technology, building new systems from the ground up, and embracing artificial intelligence (AI)-native architectures. These strategies aim to provide new perspectives for the independent innovation and development of domestic simulation software.

A Review Of Intelligent Generation Of Combat Simulation Scenarios, Zhiming Dong, Zhongqi Hu, Zhaoyang Liu, Heyang Zhou

Journal of System Simulation

Abstract: In order to improve the efficiency of combat simulation, this paper provided a theoretical reference for the research on the intelligent generation of combat simulation scenarios. It systematically reviewed the intelligent generation methods of combat simulation scenarios based on large language models (LLMs). It began by introducing the basic content of combat simulation scenarios, analyzed the shortcomings of current mainstream scenario generation methods, and discussed how to leverage LLMs to address these issues. Next, it outlined the application paradigms and key supporting technologies for the intelligent generation of combat simulation scenarios based on LLMs. Finally, it pointed out the …

Multi-Scenario Multi-Satellite Mission Planning Method Based On Adaptive Large Neighborhood Search, Xiutian Li, Ling Wang, Yingwu Chen, Lining Xing, Yingguo Chen

Journal of System Simulation

Abstract: To further improve the execution efficiency of remote sensing satellites, an integrated optimization framework combining adaptive large neighborhood search (ALNS) and a constraint programming-boolean satisfiability problem (CP-SAT) solver monitor was proposed, addressing the challenges of complex constraints, dynamic scale, and resource heterogeneity in multi-scenario multi-satellite mission planning. A unified multi-objective mixed-integer programming model was established, coupling heterogeneous constraints of point targets and area tasks. A time-domain rolling mechanism dynamically decomposed the problem scale, and a priority screening strategy enhanced the search efficiency of ALNS. Solution feasibility was verified in real time through the CP-SAT monitor. Results show that compared …

Research On High-Performance Optimization Methods For Fastdds In Heterogeneous Real-Time Simulation, Congping Liu, Wei Song, Jian Fang, Fei Liu

Journal of System Simulation

Abstract:FastDDS faces limitations under high-frequency data streams, such as lock contention, performance overhead from frequent context switching, and configuration complexity of multiple nodes under strict real-time constraints, which affect the experimental efficiency. This paper proposed a performance optimization method based on a batch-scalable circular queue (BSCQ). The approach replaced the traditional mutex mechanism with a lock-free algorithm to reduce lock contention and avoid deadlocks, while batch processing improved data locality, cache hit rates, and memory utilization, effectively reducing data transmission delay and improving system throughput. Hazard pointers were introduced to ensure safe memory management during batch processing and eliminate …

Secondary Malignancies In Patients With Meningioma: A Surveillance, Epidemiology, And End Results Data Analysis, Maxwell W. Pickles, Thomas Z. Rohan, Shreya Vinjamuri, Nikolaos Mouchtouris, Roger Murayi, David P. Bray, James J. Evans

Department of Neurosurgery Faculty Papers

BACKGROUND: The risk of secondary primary malignancies (SPMs) in meningioma patients is not well understood. In this unidirectional analysis, we evaluated the risk of SPMs occurring following a primary diagnosis of meningioma.

METHODS: The Surveillance, Epidemiology, and End Results (SEER-17) database (2000-2020) was used to identify 124,769 meningioma patients from a total of 9,208,295 cancer cases. Standardized incidence ratios (SIRs) were calculated using SEER's statistical analysis package to evaluate SPM risk. Basic demographic and treatment information was collected as well.

RESULTS: Of the 124,769 patients, 11,411 (9.2%) received diagnoses of an SPM, which correlates to a higher risk than the …

Impact Of Sars-Cov-2 On Healthcare And Essential Workers: A Longitudinal Study Of Promis-29 Outcomes, Jocelyn Dorney, Imtiaz Ebna Mannan, Caitlin Malicki, Lauren E. Wisk, Joann Elmore, Kelli N. O'Laughlin, Dana Morse, Kristyn Gatling, Michael Gottlieb, Michelle Santangelo, Michelle L'Hommedieu, Nicole L. Gentile, Sharon Saydah, Mandy J. Hill, Ryan Huebinger, Katherine Riley Martin, Ahamed H. Idris, Efrat Kean, Kevin Schaeffer, Robert M. Rodriguez, Robert A. Weinstein, Erica S. Spatz, Inspire Group

Department of Emergency Medicine Faculty Papers

IMPORTANCE: The mandatory service of essential workers during the COVID-19 pandemic was associated with high job stress, increased SARS-CoV-2 exposure, and limited time for recovery following infection. Understanding outcomes for frontline workers can inform planning for future pandemics.

OBJECTIVE: To compare patient-reported outcomes by employment type and SARS-CoV-2 status.

DESIGN: Data from the INSPIRE registry, which enrolled COVID-positive and COVID-negative adults between 12/7/2020-8/29/2022 was analyzed. Patient-reported outcomes were collected quarterly over 18 months.

SETTING: Participants were recruited across eight US sites.

PARTICIPANTS: Employed INSPIRE participants who completed a short (3-month) and long-term (12-18 month) survey.

EXPOSURE: SARS-CoV-2 index status and …

Thinking On Simulation Science And Engineering In The Era Of Artificial Intelligence, Wenhui Fan, Yuan Jiang

Journal of System Simulation

Abstract: With the rapid advancement of artificial intelligence and computing technologies, simulation technologies have leapfrogged, propelling the discipline of simulation toward greater maturity. Research progress in computer simulation technologies both in China and abroad was reviewed, and the definition and connotation of simulation were clarified. It was proposed that the Chinese terms "仿真" "仿效"and " 模拟" be unified under a single term " 仿真" with corresponding "Simulation" "Emulation" and "Analog" in English translated uniformly as "Simulation". Simulation science and engineering discipline was delineated, which was grounded in three core theoretical foundations: analogical theory,computational theory, and model validation theory. The first-level …

Research Review Of Intelligent Navigation Simulation Technology And Its Applications, Tao Liu, Hanxi Li, Yong Yin, Jialun Liu

Journal of System Simulation

Abstract:Navigation simulation develops models of ship navigation environments and behavior to simulate ship responses under various scenarios, enabling the prediction of ship behavior under complex and disturbing conditions. With the development of computer graphics, virtual reality, and artificial intelligence technologies in recent years, especially the development of unmanned ship technology, new research topics and applications have emerged in navigation simulation technology. This paper introduced the current research status and development trends of navigation simulation technology and reviewed it from three aspects: typical scenarios, key technologies, and development trends. The development trends and key points of multi-dimensional electronic navigation charts, …