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A Study on WebAssembly and its Security
No full textThis project studies WebAssembly, a binary language specification that enables non-native languages, such as C/C++ and Rust, to run efficiently on webpages, supporting complex tasks like gaming or data processing. It functions by translating a non-native language into a WebAssembly binary, which is natively supported by most browsers. Notably, WebAssembly uses a linear memory model, storing all non-code data in a single linear array. Unfortunately, this design compromises some security principles, introducing security risks and complications.
Our overall project goal is to investigate WebAssembly functionality, develop a test program, and address a critical security challenge to enhance the safety of web applications. In particular, we have thoroughly studied WebAssembly\u27s architecture, with a focus on its linear memory model and security mechanisms. We have built a proof-of-concept prototype in C, compiled to WebAssembly, and evaluated its security by testing vulnerabilities and their impacts on the system as a whole. Finally, we have reviewed the literature to identify unresolved problems that require further investigation. Some examples of these are side-channel attacks and supply chain security for WebAssembly components. Since it is a complex system, numerous facets require study. As the use of the Internet grows with each generation, developing secure systems for sending and receiving data is more critical than ever
Reading Romance as an Act of Resistance
No full textA podcast discussion about how popular romance represents many different populations, including people of color, people with disabilities, and people who are LGBTQ+. Reading these romances with diverse characters can be a powerful mode of resistance against current anti-diversity efforts becoming more prevalent in society.
Listen to the episode. The transcript is available for download
2025: Patrick Reynolds, Milestone Book Selection
No full textPromotion to the rank of Professor Emeritus, Department of Musichttps://ecommons.udayton.edu/svc_milestone/1188/thumbnail.jp
2025: Tracy K Miller, Milestone Book Selection
No full textPromotion to the rank of Professor Emerita, Department of Management and Marketinghttps://ecommons.udayton.edu/svc_milestone/1184/thumbnail.jp
2025: Laura L. Leming, F.M.I., Milestone Book Selection
No full textPromotion to the rank of Professor Emerita, Department of Sociology, Anthropology and Social Workhttps://ecommons.udayton.edu/svc_milestone/1178/thumbnail.jp
Academic Policies Committee Minutes of the Academic Senate 2025-11-11
No full textApproved minutes of a meeting of the Academic Policies Committee of the Academic Senate of the University of Dayto
Student Academic Policies Committee Minutes of the Academic Senate 2025-11-03
No full textApproved minutes of a meeting of the Student Academic Policies Committee of the Academic Senate of the University of Dayton
A Multiplicity of Cis-Regulatory Elements Drive Regulatory Gene Expression for a Drosophila Pigmentation Trait
No full textAn open question of biological inquiry is what are the genetic and molecular changes responsible for the diversification of animal form. While these changes remain largely unresolved, case studies suggest that alterations to how conserved genes are expressed will be often encountered. Hence, of high interest are the DNA sequences, known as cis-regulatory elements or CREs, which often act as enhancers of gene expression. Some of the best studied animal CREs function as enhancers that drive a specific aspect of a gene’s expression in “modular” manner, while additional modular enhancers are responsible for the other aspects of the regulated gene’s expression. This modularity is often given as an explanation as to why gene expression evolution plays such a large role in trait evolution. In recent years, a growing list of genes in multiple animal species has been shown to be regulated by redundant, non-modular, enhancers. In this thesis, we used the evolution of the male-specific, dimorphic, pattern of abdomen pigmentation of the Drosophila (D.) melanogaster fruit fly as a model trait to study the CREs controlling the expression of several key genes. 29 DNA sequences were evaluated from the D. melanogaster genome that were previously predicted by the SCRMshaw bioinformatic tool as potential pupal abdomen enhancers. Among these were four predicted CREs for both the grainy head and homothorax gene loci, and ten in the Eip74EF gene locus. RNA-interference for these three transcription factor genes revealed that each is needed for normal pigmentation. 22 of the 29 sequences were validated as pupal epidermis enhancers through transgenic Green Fluorescent Protein reporter transgene assays. This included two of the homothorax predications, and all of the grainy head and Eip74EF predictions. The two homothorax CREs were removed from the genome by a CRISPR/Cas9 homology dependent repair approach. This resulted in subtle, incompletely penetrant and variably expressive pigmentation phenotypes, consistent with a partially-redundant role for these CREs in homothorax expression regulation. Homothorax protein expression and the enhancer activities of the two CREs were shown to be conserved among fruit fly species with the derived dimorphic pigmentation and the ancestral monomorphic pigmentation phenotype. Similarly, the comparable sequences from the Eip74EF gene of the monomorphic D. willistoni had melanogaster-like enhancer activities in reporter transgene assays. Thus, this gene’s extensive CRE redundancy predated the origin of the dimorphic trait and has been conserved for more than 30 million years. The origin and diversification of this dimorphic fruit fly pigmentation trait has been connected in other studies to changes to modular CREs for genes that are part of the trait’s gene regulatory network. The work here demonstrates that this gene regulatory network also includes several important genes that are regulated by non-modular redundant CREs. Together these studies suggest that gene regulatory networks can include genes with modular regulation and genes with redundant regulation. When these traits evolve, changes can be anticipated for the CREs of modularly regulated genes, while the expression of the redundantly regulated genes will remain conserved
Mary as Nurturer, a New Model for Contemporary Times
No full textThe theological significance of Mary as nurturer is often overlooked in historical and theological narratives. This aspect of the tradition merits attention because it brings Mary closer to humanity, positioning her as one who walks alongside humankind. Contextualizing Mary\u27s cultural and historical background provides a framework for understanding how the concept of nurturing existed during her time. Given this information, a cursory definition of Mary as nurturer can be crafted: Mary as nurturer is one who provides a life-sustaining transformative relationship of intimacy rooted in love for the individual with whom she is in relationship, and grounded in love for the triune God. Expanding emphasis to diverse cultural and spiritual expressions, with a focus on the Marianist Family, provides nuanced additional information for this definition. Community, participation, and practice emerge as crucial elements of the definition considering the Marianist Family foundation in Europe and lay expression of the Marianist Charism in the United States of America. Finally, exploring the implantation of the Marianist Charism in Peru and the cultic practices associated with La Virgen de la Puerta incorporates corporality and the reciprocal nature of Mary’s nurturing into the definition. The developed definition of Mary as nurturer reads: Mary as nurturer provides a life-sustaining transformative relationship of intimacy. She invites others into this intimacy as communities and allows for their reciprocal participation in her nurturing through corporal practices. These corporal practices are rooted in love for Mary, individuals, or communities and grounded in love for the triune God
Development and Characterization of Various Phosphorus-Based Reactive Flame Retardants for Epoxy Resin Systems Used as a Matrix for High-Performance Fiber Reinforced Composites
No full textThis dissertation investigates the development and application of non-halogenated, phosphorus-based reactive flame retardants in epoxy resin systems, focusing on optimizing the balance between fire resistance, mechanical properties, ease of processing, and cost-efficiency. Traditional halogenated retardants, while effective, pose significant environmental risks, necessitating the exploration of safer alternatives. Chapter 1 discusses the challenges of enhancing fire resistance in epoxy resins without relying on halogenated compounds. It emphasizes the need for solutions that integrate seamlessly with epoxy matrices, maintaining or enhancing mechanical performance cost-effectively. This chapter underscores the significance of this research in modern material science, highlighting the need for materials that can resist rapid combustion and meet stringent fire safety standards while being economical and easy to process. Chapter 2 presents a literature review showing the state-of-the-art in reactive phosphorus-based retardants and their ability to improve fire resistance through multiple mechanisms. It also identifies existing gaps in achieving an optimal balance with mechanical properties. Chapter 3 details the testing of FR5, an amine-functionalized phosphorus hydrazide, noting its effectiveness in improving char formation and smoke reduction but its limited impact on peak heat release rates. This result indicates the need for further development or combinations with other retardant chemistries to enhance effectiveness. Chapter 4 explores the use of P-DGEBA, a phosphorus-modified epoxy monomer, in carbon fiber composites, revealing its ability to enhance the glass transition temperature and reduce heat release. However, further studies are needed to fully understand its impact on composite properties and processing. Chapter 5 investigates the effects of commercially available phosphorus-based flame retardants like Fyrol PMP and DOPO on blends of DGEBA epoxy (EP) with cyanate ester, including several cyanate ester monomers such as LECy and LVT-100. This work demonstrates significant advances in thermal stability and processing capabilities, which suggests potential for reduced manufacturing costs while considering the trade-offs in mechanical properties. Chapter 6 focuses on the transformative impact of incorporating PMP in LVT-100/EP blends, highlighting its unexpected role in accelerating curing processes and enhancing manufacturability without compromising material integrity. Chapter 7 delves into the dual-stage curing kinetics of resin blends containing PMP, providing insights into the processing dynamics of LVT-100/EP/PMP blends. It emphasizes the efficiency of PMP in reducing gelation times and optimizing cure cycles, significantly aiding high-quality composite panel manufacturing. Differential Scanning Calorimetry and parallel plate rheology were used to explore the catalytic behavior, which provided key information needed to modify the cure cycle of PMP-containing composites so that acceptable fiber volume fraction could be achieved. This chapter stresses the importance of precise control over processing conditions to maximize the benefits of PMP, balancing curing efficiency with processability for optimal composite quality. In conclusion, this research demonstrates the use of phosphorus-based flame retardants for achieving an optimized balance between fire safety, mechanical integrity, and processing efficiency in epoxy and epoxy/cyanate resin systems. The findings advance the field by adding new knowledge to a material formulation space previously unexplored, highlighting complex interactions between composition, processing, and the resulting balance of properties in both neat resin and carbon fiber reinforced samples. As such, this study provides a valuable resource for future innovations in safety-critical applications